I have used Windows 8 developer preview (or something like that) and it's actually pretty good if you're going to be using it on a tablet computer. The applications are all full screen and stuff, and browsing on Internet Explorer in Full Screen mode as tablet is actually pretty cool, which is surprising. I just hope future tablets will have a better touch screen that can compete with that of the iPad and the Samsung Galaxy, now that would be awesome.
I agree that was the item I liked. I had the original HP and loved it. It was loud and hot and
slow by today's standards, but convenient. My iPad has come the closest. I do miss the tablet version of OneNote.
Samsung's Smart Window is impressive in a futuristic sort of way, but I don't think it has a lot of practical usages at this point, and using it wouldn't be ergonomical due to the side effects associated with extending the arms and making small motions.