Yeah, it's fun to use the digital media during rpg's. My gaming table is next to my PC desk to I turn one screen more to the players to show some flavour images. This is always cool if you can find great lanscape picture that more or less are the area you're describing. A mate fo mine who GM's RIFTS even did an interactive mission briefing my webspace to show us, which was pretty cool.
Ever since then I've been scouring the web for windows tablet PC's as they're coming out. One that really caught my eye (lidless, wreathed in flame) is this one: The Wetab
http://wetab.mobi/en/product-details
Best one I've seen so far that's affordable, if only it would come out like, now!