The upcoming devices from RIM are shipping with more than simply a new upgraded processor. They BlackBerry 7 OS has been updated to support the new screen sizes and other hardware. RIM has confirmed the screen sizes for upcoming devices along with their model numbers in this update for developers:
This confirms the BlackBerry 9360 with 480×360 screen resolution (Next Gen Curve) BlackBerry 9810 with 480×640 screen resolution (Torch 2) and the upcoming all touch 9850 with a 480×800 screen resolution. The PPI for the screens are also nice and high at 240+.
If you develop BlackBerry Java apps you definitely want to check out these two articles by RIM on what you need to know about BlackBerry 7: