Two free to play i developpement for PSVita.
Q Entertainment Bringing Free Online RPG Guardian Hearts to PlayStation Vita
http://andriasang.com/con23n/guardian_hearts_vita/
Ragnarok Odyssey Publisher Working On Free To Play Vita Game
http://www.siliconera.com/2012/07/31/ragnarok-odyssey-publisher-working-on-free-to-play-vita-game/
http://andriasang.com/con23q/picot_knight_detailed/
http://andriasang.com/con23t/picotto_knight_screens/
PS4 - over 100 millions let's say 120m
Xbox One - 70m
Wii U - 25m
Vita - 15m if it will not get Final Fantasy Kingdoms Heart and Monster Hunter 20m otherwise
3DS - 80m