I currently have two 27" and three 24" displays on my desk. I already physically move to focus on specific tasks (eg. I have email on a vertical monitor on the side, so when answering emails I'll roll over a bit to the side with my chair).

With a TV, I could have one big seamless area instead.

The one thing that does worry me about the TV is the lack of tilt at the top -- everything in the top half of the monitor will be hard to see because of the angle.

When I work with pen and paper, my entire desk is full of stuff, a dozen sheets and books, printouts and diagrams, all visible at a glance.

I don't see why I should limit myself to a much smaller area when working digitally.