The Ivy Bridge won't offer anywhere near the battery life of an ARM tablet, though. At best it will be half of that.
Fans and vents on a tablet... I just can't see that catching on for many people. The ARM model is more promising, but this competes much more closely with the iPad.
Also, the video was very funny with the pen input -- his palm interferes with the initial demo and 20 seconds later he's talking about their amazing palm rejection technology. Don't even get me started on the fact that none of the presenters seemed able to get the swipe-in-from-the-side gesture to work on the first try.
seriously, other than PC games, I don't know a single windows app I want to run on a tablet form factor.