I got a PS4 and bought a vita last week specifically for remote play. I have enjoyed it but my hands just don't fit right on the Vita and using the back touchpad is pain right now, I either don't touch it correctly when needed or I accidentally touch it when not meaning too.. At least some of the games adjust the controls to make it easier with the Vita (COD:Ghosts and Need for Speed). I wish NBA2k14 would move the turbo button. I ordered a Vita grip/case from Amazon to try and see if that will help my hands be more comfortable with the setup. That is coming today, so hopefully tonight I'll know.
I am really looking forward to getting comfortable with the controls and I see this expanding my gaming time by a ton since it is hard for me to seclude myself in my projector room for hours when I have a young daughter.