I know its going to be a little while before they become avaliable, but I hearing some really good things about Organic light emitting polymers. They use hardly any power, require no back light, and can be produced to high resolutions. Also, from what I understand they should be no more expensive than a cheap LCD.

Now a full colour display, taking next to no power, with a low cost, would be an excellent replacement to the current vacuum display.

Oh and also the people who make the displays (CDT) are based in Cambridge, as is EMPEG. Nice.

Cadders,
Number 10163 in the queue. I fear I'll be in for a bit of a wait.