I'm sure, just like the NES/Snes classic you'll be able to hack this thing and put whatever you want on it. I've never really seen the point in these devices though, if you're going to emulate the games instead of buying the original console, then just emulate them on something you own.
Or alternatively you'll probably be able to get a case for the Raspberry Pi and make your own "PlayStation Classic" at a fraction of the cost.
The only purpose I see to these classic devices is for a games collection, to sit and look pretty. In which case it doesn't really matter what games are on it.