The Vita isn't doing that well, so I don't see a demand for this at all. Especially since Vita games aren't even running at 720p @ 30 FPS, who wants to see that on a "60 screen ?
I love games but the Vita does nothing for me. If I'm at home with a PS4, why the hell would I want to play a handheld ? When I'm not at home, I have no desire or time to play games.