You can play PS3 and PS2 games on your PS4 or PC by signing up for PlayStation Now, Sony's game streaming service.

PS4 and PS Vita owners can start streaming from a library of backwards compatible titles in 2014, Sony Worldwide Studios president Shuhei Yoshida told IGN this week.

I have an old US 60GB PS3 Fat with backwards compatibility (CBEH-1000) (with HDD upgraded)... I know lot of people had overheating issues, YLOD etc. with their fat models and it is always whay ...