I'll answer for each console and handheld even though I just have 360 and PSP.
360 - Blu Ray, plus for God sake make it quieter. I have to turn the volume up to drown out the noise of the fans.
PS3 - I would like. Shit I'm having trouble thinking of things. It's already got everything its just too darn expensive. I guess maybe more online related features that its still missing compared to XBL.
Wii - High definition, get with the times. I know your having success but eventually people will want HD gaming once HD tv's dominate every house.
PSP - Dual Joysticks with better placement and improved battery life
DS - Well I don't have a DS and haven't played one. I know its not a feature but I would want better games like the GB and GBA had.
Owner of 360
Future owner of a PS3 (when it drops to $300)
