It's something that I've mulled over about before myself, actually. I invisioned a T-shaped controller, with the screen at top. And while it's a good point that it could mean looking away from the television, Nintendo's no stranger to this idea: look at the GBA link cables to GC. If that feature were to be built in to the controller, then games like 4 Swords Adventure and Crystal Chronicles may have more luck by not needing extra peripherals. I could see it doing something as simple as copying the TV screen for touching interactivity, to being something that could help increase immersion, like looking down at a map.
The other thing I could see Nintendo doing is pressure-sensitive keys, but I don't know how well that would work...
-dunno001
-On a quest for the truly perfect game; I don't think it exists...
