I think your reading too much into it, its a feature that is extremely easy for devs that are already making multi platform games to support. Online user title storage is something the PS3 has always supported so for a lot of devs its not even a new feature. Same goes for cross platform play once youve written your PSN login code and match making code its the same for both systems, its cheap wins and a big tick for the back of the box.
Of course Vita needs its own experiences and it will get them, it already has exclusive games and there are plenty more coming.







