Additionally, a leaked screenshot shows some support for a screen with resolution of 1280 x 768. The current 7 inch BlackBerry PlayBook screen has resolution of 1024 x 600. This higher resolution screen is most likely being tested on new versions of the PlayBook that will be run by the new BlackBerry 10 OS. With 4G LTE connectivity and a higher resolution screen, we would probably see this new BlackBerry tablet launch no earlier than sometime early next year.
source: N4BB via UnwiredView
Found in the Developer Beta of BlackBerry PlayBook OS 2.0, 4G and 4G LTE icons (L) and hints of a higher resolution screen (R)