I doubt anyone said it was impossible
The PS3 was able to run every game Sony had ever made at the time (barring PSP and Vita)
Trashstation 4
Seriously though next gen Sony better get it together. They livin off mid-cycle PS3 hype right now
The PS3 can run psp games if you got that custom firmware. Backwards compatibility is only important the first year a new console releases. Or if a console has no games and nikkaz are starving to play games.