I think you're right and that the reason the Vita game base is starting to grow is because developers have realized that they can create a Vita/PS3 game without the limitations that the PSP imposed. Now we're seeing a lot less new games being developed for the PSP but instead being announced for the Vita/PS3. Even the niche anime genre the PSP has commanded is beginning to shift. The new Rozen Maiden game, for instance, is PSV.








