Streaming PC/PS3 on vita

Hey guys

I just wanna know if I get a modded vita and with moonlight can I stream all ganes from PC and PS3?

And as I know it is possible for pc, if I wanna play games which support dualshocks, will it gonna be playabke via PS buttons or Xbox buttons? Cause sometimes I gey confused when playing via dualshock but it shows xbox input bottons and it is a little confusing for me

Thanks in advanced