While it seems increasingly likely Apple will be going with a bigger, close to 4-inch iPhone 5 screen, and that that screen will be close to a 16:9 aspect ratio (making it taller but not wider). However, until we see Tim Cook or Phil Schiller (or dare we hope, Jony Ive?) hold it up on stage, we still have time to dream.
Rather than go over all the options again here, I'll point you to Rene's excellent post on the 4-inch iPhone from a few days ago. Give it a look, then come back here and vote on which 4-inch screen option you'd most like Apple to go with? 2:3 at 960x640 stretched? 2:3 at 1920x1280 stretched? 9:5 at 640 x 1136 taller? 2:3 at 1092x728 bigger? 16:9 at 1280x720 bigger and taller? 3:4 at 1024x768 bigger and taller? Or do you deeply, truly still hope Apple sticks with the 3.5-inch iPhone that brought them to the dance in the first place?
Vote up top and tell me why in the comments!