@ AC
The point I made was that Microsoft cannot be said to be jumping on the bandwagon here. Microsoft and the OEMS together have made products that run a full-fat OS in a slate/tablet model.
But since you want to widen the debate, you might want to start by checking your facts. You state that that the Tablet PCs ran "resistive touch screens". Whereas most of them actually ran Wacom's Penabled system. If you're a graphic artist and want to draw straight onto the screen of your Device, these are awesome. I have had an HP tc1100 for 4 years. When it comes to digital painting, it is without exception the best non-desktop I have ever used. I've also never had any of these manufacturing problems you speak of... but I digress.
You say that "most of the technology" for the Tablet PCs was developed by Apple for the Newton. I haven't researched this, but it seems unlikely, for two reasons:
1) the Newtons ran totally different hardware, software and operating systems from the Tablet PCs; and
2) if such technology was developed for the Newtons, Apple would (like any sensible company) have patented it. Since patents last for 20 years, it seems heavily unlikely that MS would have used Apple's technology, but please let me know if you have any evidence of this. Alternatively, if you just made this argument up, and have no real facts to back it up, then please let me know that instead.
When it comes to being a success, you seem to misunderstand the point. Tablet PCs were never going to dominate the market. They are a niche product. But both Microsoft and the OEMs have managed to make money out of them for the last decade. I'm not sure what you mean by "success", but from a corporate perspective, making money is more or less the only relevant thing.
I also am not sure I understand your point about announcements. MS announced an actual product, complete with a demo. Apple have announced nothing. That's no slight against Apple (it is, as you point out, their way of doing business). But (going back to my first point) it does mean that commentards like the original poster can't argue that MS is copying Apple, since there's nothing to copy yet. I know the fanbois like to believe that Apple invented everything first, but they didn't.
As for believing what I wrote, I can only refer you to my own experience. I want a tablet that I can carry with me, use on the tube/train/whatever and that allows me to draw on the screen, that recognises full pressure sensitivity. I want it to let me do this in the most advanced programs available (that means full versions of Photoshop and Corel Painter at a minimum). HP and Microsoft produced the HP tc1100 that allows me to do all of these things. Apple don't make anything that allows me to do these things, and all the indications are that when they do make a tablet, it'll run the iPhone OS (which means no Photoshop, and no Corel Painter). Interestingly, there is a company that makes a modbook version of a tablet by gutting a macbook and adding a Wacom stylus, essentially turning it into a Mac version of the Tablet PC... bandwagon, anyone?
http://eshop.macsales.com/shop/Modbook