Most important spec for Win8 devices: Screen Resolution
There has been a lot of talk of ARM vs x86 and case materials and such but to me the most important unanswered question is...
"What will the screen resolutions be?"
Intel keeps demoing their Atom chips on screens that are below 1080p and no one has even hinted at a high res screen. Even the Amazon Kindle screens are high res and I think the Win8 OEMS better step up their game on the screen res or all the reviewers are going to crush them for releasing tech with half the res of the iPad.
Asus has been the only one to announce a 1080p panel and their device is over $1k which really doesn't compete with the other tablets.