download lang yan pre(PSN games).....kaya nga its a "cloud" will have answer for good backward compabilities(kasi yung ibang games sa PS2 may topak sa PS3 kahit nasa PSN release sila)
did you not watch the video? hahaha im starting to have a headache thinking of how to explain it any simpler
PS1, 2, 3 and PSP games will have COPIES on CLOUD Servers most probably GAIKAI since SONY owns it, ALL PS1, 2 ,3, PSP games you want to play on the PS4 will be from there, STREAMING NOT DOWNLOADING, i will bet that SONY will give PS1, 2, 3 Game Disc owners the option to register the games they already own or games they will potentially buy so that if they decide to get a PS4 and want to play OLDER TITLES from OLDER CONSOLES
as shown on the video it will not be limited to PS4s, the VITA, Smartphones and Tablets will be included but may be limited to PS1-2 and PSP Titles