I'd like to have custom firmware, be able to play PS1 and PS2 games, play backups for PS4 games, emulator for N64 (still waiting for a way to play banjo-tooie), game modding, be able to access the PSN without updating the firmware. Or at least another method to access the stuff on it. Something like CIAngel on 3DS or FunkiiU on Wii U/PC.