IMO PS3 should make the most profit it could make,it hasn't exactly been the most profitable console for Sony.
Sign this petition please if you want GTA san andreas on PS Vita:
http://www.change.org/petitions/rockstar-games-port-grand-theft-auto-san-andreas-to-the-playstation-vita
And please spread it to various sites/forums etc.
Upcoming notable indies for PS Vita: