Sony could do off-TV play with mandatory remote play for vita, which would also encourage sales of vita for those that find off-TV valuable.
ZombiU could completely be done on a single screen without much change. You could keep the real time aspect and just have the camera looking down into your bag and only a peripheral view of your surroundings so you can see movement etc. for keypads you could have a 'glance behind you' button.
It wouldn't be the same, but it'd be close enough to not be a game breaker in any way.
I don't want a bulky screen sucking up my battery and costing Sony money that they should be spending on the guys of he machine.
Just give me a dual shock with concave secondary triggers (perhaps shifted down a bit), with upgraded motion sensors like move/vita so I can have motion assisted aiming like uncharted (zelda in Nintendoland also nicely shows the improvd motion tracking), and *maybe* if you have to, some move/eye toy packed in, but not if it doesn't cost you too much. POWAH first please.
I predict that's exactly what they're going to add to Dualshock 4 (a la Vita's back touchpad)
Noo, I hate the vita rear touch pad, and have yet to find anything that uses it well - it just gets in the way with too many false positives
Edit: I'll take what Sawyer is saying, but without the 'central display with touch' - that can be a vita for those that want streaming