you know, working on a terminal (thin client) is nothing particularly new. and when you attach a keyboard and a mouse/touchpad to assemble a kind-of-laptop-but-not-laptop terminal it's by strict measures no longer 'working on a tablet', so what's the point of it exactly? carrying around a keyboard to say you don't use a netbook, it's a tablet? trying to prove something?
I hate to disagree with you because I abhor the idea of using a tablet for my work. However, it's still a machine that gets longer battery life than a laptop, is smaller (so theoretically more portable), lacks a lot of the power of a laptop, etc. It isn't the same as using a laptop. It's both more and less convenient.