An astonishing beautiful large screen. Crisp, clear, large. Must be at least as large as the 3DS top screen, preferably 720p capable, but i've started to budge a little on this, since it just might be asking too much on a screen smaller than 7 inches.
Dual analog stick.
Uses either proprietary flash for games or secure SD/Sony Memory stick cards for games. Though I plan on strictly using digital download options.
And yes, full PSN support.
Other than that I just don't see much possible 'innovation'. People can claim that 3D or touch screen is innovative, but I think its crap junk and a waste of time.
Just having a powerful, portable, reasonably priced, supported gaming system not cluttered by useless gimmicks and nintendo childish handholding would be a mega hit for me.











