God I'm so sick of people making this excuse. So just because no one else has found the right formula it means that Apple can't right?
Have you ever used a tablet before? If not you are missing out. The experience feels much more personal for some reason. It feels like a platform that is begging for Apple to do something with it.
PS- Let me guess you were one of those people screeching that Apple would NEVER go Intel. Would never release an iPod with photo capabilities or video. Would never allow Windows to run on a Mac.
Its running a slightly modified version of Windows. What did you expect?

Anyone who comes out with a tablet needs to do more then slap their OS on it. there needs to be a fundimental shift in HOW you interact with the OS.
Sorry, Silicon, but your "If Apple does it, it works" argument is weak in this case...the Tablet market is simply tiny, period.
And why so? Because, instead of facing a constrained demand for music players or video players (as in the case of the iPod market), the Tablet faces NOTHING which is not already dealt with under other segments.
We have, on one hand, desktops, laptops and notebooks which fit the bill for everyone, notably if we consider the small-sub note market (10"-13").
On the other hand, we have full-fledged mobile phones and PDAs which cover the needs of those preferring portability over sheer power.
And where are the tablets? NOWHERE, because they only fit the bills of us freaks desiring a nice pen-based Mac...sorry, it's not enough for a big company like Apple to base its products on such a small audience...and I am sure their market analysis team has already done its homework.
Windows is a CRAP, granted...but this doesn't block PC fanboys from buying millions of notebooks every year; this argument is moot as well, and OS X will have limited market impact for the adoption of a Tablet.
As for your funny arguments at the end, I may just say that they have nothing to do with other product adoptions such as the vPod and the Intel switch...the former is a basic evolution of the iPod (although still selling much less than normal iPods devoted to music), the latter a clear choice by Apple in face of IBM's lack of devotion to the PowerPC.
You seem to speak from a position of personal knowledge. Is this because you actual know these facts, or is it just the conviction of your analysis?
I happen to know one of your statements is false. My company needs it and wants it. So do many people in the construction industry. In many respects, we are blind to the activities where we make our money. So, we are forced to often depend on a management layer to provide a communication stream between our administrative resources and our jobsites. However, in many cases, we manage in reactionary mode because of the inadequacies of our communication pathway.
When I was hired seven years ago, one of my assigned goals was to automate our field operations. I am going to condense many years of study and experimentation into a single statement. Tablet PC's have the right combination of footprint and technology to 'close the loop' for what we need.
My company has incorporated many advanced technologies. We have hosted numerous 'show and tell' sessions for others in the industry. A by-product of this has been the development of a large peer group of other construction IT professionals. We all see the need to manage field operations through technology, not through untimely reports, telephone calls and/or faxes, weekly meetings, etc.
Sorry, your argument is also insufficient. Construction companies have used PDAs for years, including the Newton...and that's why a mere evolution of such products is more than enough. If you think ONE anecdotal evidence of a company adopting advanced technologies is enough, think again.
For 99% of the market needing portability (including construction, engineering, delivery companies, logistics integrators and the like), people will go either "notebook" or "advanced PDA"...the Tablet is right in-between, squeezed among 2 MUCH clearer choices. "Footprint" and "technology" are pretty much covered by both poles...and not by a vaporware Tablet.
Origami = Tablet = Flop...never forget this.