As much as I loved remote play with the PS4, it would have been really cool at the time to have a fully developed remote play feature with the PS3. : r/vita
PSP "Trophies" grab was Remote Play for PS3, says SCEE | VG247
Remote Play - PS3 Developer wiki
Using remote play (via the Internet)
PS3 remote play, can't really do anything but it's really impressive for the time : r/PSP
PSP2 and the Playstation Phone Are Two Different Products - SonyRumors
Enable PSP Remote Play on Playstation 3 games which don't support it officially | Digiex