Lets all gather info about the sprint kyocera echo and post it here
I think they messed this one up. I'd rather see a dual screen where the 2nd screen is simply a keyboard. and it could change to, say, a gamepad, touchpad, or whatever else a dev wants. (ie, kinda like a droid, but instead of a physical keyboard slider, you have a touch screen keyboard underneath)
One of the articles was talking about how every app would have to be custom tailored for this one phone, and that most simply won't work. but if they made it so the 2nd screen was only recognized as a keyboard or other input device... win.