I think I can answer your question, at least from my own personal standpoint. And let me preface this by saying; the biggest difference in this world you can make is that of a consumer. Please, research where your hard earned money goes, support ethical business, even if it means paying a little bit extra.
The reason why so many geeks don't get the iPad is quite simply because there's nothing it can do that my Android (Motorola Atrix) can't do at least as well or better. My Android gets the win because it easily fits into my pocket.
If I'm going to be carrying around a device that requires some sort of bag, I will always choose my notebook (dualbooting windows and linux tyvm). The reason for this is because as nifty as an iPad might be to have, it's simply not practical. Whatever situation an iPad might be useful in, I can just pop out my phone and do the exact same thing, with one hand literally behind my back. When I need quick computing on the go, say internet banking, or entertainment, I can just pull out my android and get it done in a few taps of the finger. When I'm sitting in class taking notes, or on a long flight, or for portable gaming, or TRUE multitasking, the notebook can't be beat.
People like to say that the tablet fills the "third device" niche, but in reality, it's a big smartphone that can't make calls, doesn't fit into your pocket, is awkward to hold, type on, and just use in general, and was endorsed by Steve Jobs. Now, I'm not saying that it doesn't have its place in the world. They are absolutely amazing for grade school, providing a method for interactive lessons, and saving children from having to carry around 30 pound backpacks, which is causing some major problems later in life. They're also a great sales device, I know people who use them to show customers items they might be interested in. But for use in real life? They're just to limitating.
Now let me tell you about customization. You buy an iphone, and you get to change the wallpaper (after months of people begging for it) and download some apps, which automatically appear on your homescreen, and do nothing. Apple get's off on "thinking differently", but aside from the case and memory, you've got the exact same iPhone as the millions of other iPhone users out there, probably with most of the same App's as well. You give them $700 dollars for their latest gadget, and they reluctantly hand it over saying "Well, ok, but we don't really trust that you'll use this the way that WE want you to use it, so we've blocked out most of the functionality. Oh but look, you can still play angry birds!"
You buy an android, and Google says "have at 'er, you paid for it, just don't come crying to us if you brick it". Manufacturers and Carriers have tried to put their own personal locks onto the devices, but no one can keep a determined Geek out of his own device. (Go look up Android on iPhones if you don't believe me)
One of the first thing you'll notice about Android is that YOU HAVE A CHOICE! HTC, Samsung, Motorola, all of these companies and more are competing in a fair market place, offering the same software, but putting their own personal spin on how it is delivered, giving the consumers a choice in what business they would like to give their money to.
These companies have realized that healthy competition is the key to true market growth, which is probably the most American concept one could think of. Google has even stated that one of their intentions behind the acquisition of Android was because they saw that Apple was going to control the marketplace if no one stepped up to the plate, creating another Microsoft circa 1997.
The second thing you notice are widgets. Instead of having a bunch of buttons to push, these widgets allow the program to run, open, in a resizeable window on your home screen. Weather, email, time, calendars, maps, if there is an app for it, there is a widget for it, why would I tap through 8 separate apps, one-by-one, to get all of the information I require, when I can see it all with a single glance at my homescreens.
Beyond widgets, you can install custom launchers, which allow you to download an endless supply of themes, that you can interchange to customize your phone to any extent you want, change your icons, dockbar, colours, screen animations, window behaviour, what different gestures mean, app drawer, anything you want to.
Going deeper, you can install custom ROM's. A rom is essentially the particular brand of Android that comes with your particular manufacturer / carrier, so getting rid of all those useless, carrier based, preinstalled apps that you never use has never been easier.
More and more Androids are getting root access as well, the most fundamental level of access to the coding of the OS, removing absolutely ALL limitations for your phones potential. Not many people will ever really use this, but why shouldn't they be able to if they want to, they've paid for it, and if they want to void the warranty then it's their call.
I have yet to come across two androids that are the same, everyone has their own preferences, and Android truly delivers a way to make your device a work of art that reflects you're personality.
The iPad offers absolutely NO additional functionality, my nephew can't even go on nickelodeon.com because it doesn't run flash, one of the most common things on the internet, despite being 4x the size. Now if you have fat fingers, or have vision problems, then I could see the use for a screen that huge, but I can navigate through my phone with a few taps of my fingers, and I'll take swyping across 2.5 inches over trying to use a keyboard that's 9 inches long (seriously awkward size), has no tactile feedback, and that you can only see while hovering directly over top of it any day.
In terms of power, with the amount of dual-core Androids coming out, there is absolutely no lag, even when multitasking (oh yeah, Androids can do that too), so the argument that the iPad is powerful enough to do things that superphones can't is just bogus.
Now, I know what most of you are probably thinking. "This guys an idiot, who cares if I have root access to my phone/tablet or not, all I use it for is passing the time when I'm bored and texting my friends." I realize this, which is why I realize that Apple products have a place in this world. They are easy to use, they offer no choices, and therefore no confusion to those not interested in learning how technology works, and they come with some pretty cool activities and functions. But that's not what this is about. The battle of Geek versus Apple is idealogical, comparable in a way to the Socialist vs. Republican debates that go on across the world.
Now consider this final fact. Apple is essentially the child who never learned to share. They've devoted billions of dollars trying to exclude others from the market, you need only look at adobe flash, iTunes, the hundreds of flagrant lawsuits they are involved in annually, thousands of unused patent applications, and the absolute and utter secrecy with which they conduct business to realize that. If you're a geek then you have heard of open-source, and know what it means on an idealogical level. If it were up to Apple, those two words would not exist.
And that sir, is "why so many geeks do not get the iPad".