"Indies should definitely jump onto the PS Vita. RCR's sold much more on PSN than XBLA and more on PS Vita than even PS3."
Also of note, PSN version (NOT including Plus) outsold Steam and xbla ones, with xbla being the worst one (it was released later on xbla)
Also by dev-
"Steam's done far better than [XBLA], but PSN has still done the best."
"It cost more to do the XBLA version than all other SKUs combined. Made more on all other platforms. XBLA: 'a learning experience."
"Nintendo's great to work with. Both Sony and Nintendo are welcoming to indies." (via twitter)
"Sony promoted the game incredibly well and Vita players are hungry for games! Make them more!" (via twitter)
PS Vita digital sales has been good, as I said earlier, this proves it. Although vita still in a lot of trouble, hopefully some great indie devs would bring games to vita seeing this success story.
Speculation - We may see Fez on Vita. It seems Polytron was interested in the news. And they are looking for new platforms to port Fez. And they had trouble with MS.