Sony tablet S (Android Kitkat) that I bought about 4 years ago or so. It had an emulator app and a PSN store-style app to purchase both original games and classics.
The tablet came with vouchers for two games from the store, and I choose Crash Bandicoot and Jet-Moto.
So yeah, I've already (legally) played PSX games on a tablet. Not sure why this is news again.