Well the other thing as much as people slight the PSP and Vita, the truth is they weren't really "home consoles" on the go. That was always a misnomer IMO.
I mean they were reasonably well powered for a handheld certainly, but the PSP could never run Grand Theft Auto 3 or Final Fantasy X or a console equivalent version of Madden or FIFA, and it was certainly completely outdated two years later by PS3 (lol, not even in the same ball park).
The Vita similarily .... Call of Duty on Vita sure as hell is nothing like the PS3/360 versions. Neither is Assassin's Creed. It doesn't have the horsepower to run the home versions, so developers have to make bite sized spin-off versions. And compared to a PS4 ... not even close.
A developer can't take a PS4 game and port it to a Vita without reworking the entire game and graphics engine.
But mobile tech is now approaching a point now where not only might Wii U ports be possible ... but perhaps even PS4/XBox One ones. That is interesting. Probably why Nintendo is also interested in simply just fusing both hardware lines together ... well mobile chips are this powerful, you can share even the really high end console games. Sure you may have to cut down the resolution and scale down some of the effects, but it's more or less the same game.
That's different, even the PSP and Vita could not never really claim that outside of very few games.







