I would figure that the "regular" Android SDK works just fine and dandy for the LCD display. I've run across several apps that use the full screen as they should and those developers probably didn't have a clue their code was going to run on the large-screen Edge. So, the standard SDK must describe the way of doing it right.

Given the number of apps that don't open full screen I guess either they were coded to an older version of Android where the possibility of a larger screen was unknown, or many developers are just too lazy.

Of course, I wouldn't expect the eInk display to be accessible to programmers using the standard SDK.