Would it work on a smaller chassis? (Score 2, Interesting)

As other commenters have mentioned, it's about the trade off.

I guess I'd fit into the target market, as I'm a graphic designer and video editor, so more screen and more power are always nice. But I can't see me ever going larger than the 15.4" screen laptop I have now.

Why? Because, as nice as a bigger screen/more screens would be, it would guarantee that I couldn't do anything until I reached my destination unless I carried a smaller laptop as well. The laptop I have (Dell D820) is awkward on planes unless travelling business class or above, as it's slightly too big to fit on a tray table comfortably. Ditto for train travel (in the UK) -- even at a "table" seat (2 pairs of seats facing, separated by a small table) it's necessary to have the laptop uncomfortably close to the edge of the table so as not to use all of the table space belonging to the person opposite.

It seems to me that the extending display tech would be more suited to a smaller laptop -- if it can be made to work -- so you can have portability but still have a sizable working desktop when you have the space.