Here's the particulars:
- cross-buy, and cross-buy with the PS4 version. If you got the PS4 version free with PS+, yes, you get this version free too.
- locked at 30FPS (it's 60 on PS4).
- no word on whether or not the Heroes DLC will be included.
Oh, also, a new Super Stardust got announced today - Super Stardust Ultra is coming to PS4 in "early 2015," from some of Sony's studios in Europe - not series stewards Housemarque (who are, I suspect, hard at work on Alienation at the moment).