The iPod had (and probably still has) the best user interface of any MP3 player.
There is not the slightest hint that suggests a touchscreen tablet is a superior interface to anything already on the market. You hold it with one hand and hunt/peck type with another, inefficient. You lay it flat and stare down at a table, inefficient. You prop it against your knees (God help you if you're 30+ or don't want to put your feet on your furniture) and type at an awkward angle, inefficient.
Notice all the promotional material when the person is typing on the iPad:
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When is the last time you sat like that? WTF.... are his legs floating in the air, or up on a table? Or is it a contrived video that masks just how awkward any level of productivity will be on this thing?
Toy? Yes. Paradigm shift? Laughable.
When was the last time I sat like that? Hmmm...yesterday evening. While my head was resting on my wife's legs my feet were just put on the sofa while I was surfing with my Powerbook.
So...yeah...I'd sit like this a lot of times. Like two to three hrs an evening.
And talking about productivity: What do you actually need as information to understand, that the iPad is
in no way meant to be a productivity tool? It's a
LIFESTYLE OBJECT, giving you some convenient time while doing
leisure projects (like using Numbers for your household plan).
Maybe I should put it that way: The iPad is an
accessory. It is
no tool.
Think it will flop? Well, in the nerd community basically yes, but I see millions of 30+ people, that will love this thing.
Why do you think, Apple designed a very high profile accessory case?
Because they know, that people like me will spend 150$ alone for this spectacular case.
You think, that's not worthy? Well, let me tell you that way, I'm still waiting for a MBP, that will replace my Powerbook. I'm still waiting for a 15-incher, that not only sells for 3,500 € (should be around 4,500 $) but is worth that money. I paid that for my Powerbook and still don't regret it.
So I'd rather go for the top-of-the-line 3G iPad to tide me over, while Apple still fails to deliver a worthy notebook.
But as soon as there is a Core i5-MBP 15" with Blu-Ray, that is half an inch thicker but offers some hrs. more battery and comes with OLED and some advanced I/O-options (say FW 3200, USB 3 or LightPeak) - count me in. I'm buying.