I got my first peek at a Tablet running Aero Glass yesterday. Wow! Considering that it's currently all visual effect and not really worth anything other than eye candy, it was hardly worth the effort/expense involved to make this particular Tablet run Glass, but then, that's a practical issue and Vista is destined to get people to buy new machines with Vista preloaded, Glass turned on, etc. Existing mobile PCs in general won't be able to run Glass. Period. End of story.
For the majority of folks who are running productivity software, surfing the web, sending email, chatting on IM, it won't make a darn bit of difference to your experience with Vista whether you have Glass or not. Go on ahead and load Vista on your Transmeta or P3-ULV CPU machines. I dare you to run Vista on your 256MB or 512MB maximum portables. Just don't think that you'll be happy about it.
In my opinion, the same value decisions we Hardware Junkies use to determine parts for our desktop systems are still valid for determining specs on our portable systems.
No, I won't tell you which Tablet was running Glass. Next question please...