So ah,how can we know that until MS/Sony's official announcement,but i highly doubt Durango's OS(+apps,i know) will use 1GB RAM,since even Win8 for PC use less RAM than Win7(they won't go back),plus Kinect never a expensive thing(unless include marketing cost)
Next gen=new start=new rule,we need to know that
And like many people,i also think Sony should learn their lesson after PS3's launch...but then PSV launched...well,i don't think they really learned anything.
I think they learned plenty from the hardware side with the PS Vita. They had a commonly used CPU with an easy to understand GPU, and put it in an attractive package with a 2nd joystick that every PSP owner clamored for.
The problem with the PS Vita isn't the hardware, it's a lack of games (same with the Nintendo 3DS in its early life), plus it's competing with smartphones which is a whole 'nother ball game.
Any "mistakes" the PS Vita made aren't really relevant to the PS4, since they are really only competing with Microsoft instead of every cell phone company and Nintendo for your mobile entertainment time.