on the other hand: can you name a single title for this? do we expect them to trickle out like PS1 games on Vita, before ceasing? what about licensing rights, latency issues, etc etc? they've said lots of stuff, i see no reason to get excited about this as a BC workaround until we get more details. he's not wrong, it's just talk for now.
That's irrelevant. Sony have formally announced that Gaikia (aka Playstation Cloud) will be used for BC.
Obviously it's still just talk at this point in time, as the PS4 hasn't been released yet. Until it's on the shelves and you can buy it, the PS4 is still just talk as well.