On PlayStation YouTube page, there is a new video showing off that Flower, Flow, Sound Shapes and Escape Plan are coming to PS4 and PS Vita, and that they are also cross buy.
If you don't know what cross buy is, it is something where if you buy something on one system, you get it for another system for free, that it is also on. so take Flower, if you already have that game on PS3, when PS4 comes out, you can now download that for free on the PS4 when that game comes out on PS4.