Hmm. I'm not so sure about that combination. The thing that won me over for Gnome3, the same thing I had overlooked when I first disgarded it, is the use of keyboard shortcuts. It makes operating the desktop amazingly quick, to the point it can compete with something like a well configured E16 (Enlightenment) desktop. I have trouble seeing how a virtual keyboard would give me that experience.

That being said, lots of people seem to enjoy keyboardless devices, so my judgement holds no more value than that: I'd find it difficult to work with, I guess.

I have an Archos tablet idly laying around because of it.