Sony already failed with the previous all digital PSP and then the Vita, I'm pretty sure they're done with handheld gaming at this point, they realise they cannot compete with Nintendo on that ground and decided to focus on their home console, they'll probably shift some focus onto mobile devices but it still won't be amazing or anything, probably more suited towards games you play on the train or travel in general but not games you'd play for hours like you would on a handheld.
I'm pretty sure we've already established that Sony and Nintendo would never partner up anyway given the evidence over the years, same with Microsoft, the peroid of making games for other rivals is pretty much over and done with.
Mankind, in its arrogance and self-delusion, must believe they are the mirrors to God in both their image and their power. If something shatters that mirror, then it must be totally destroyed.
