The Xperia Z line is pretty much the logical evolution of the PS portable line. I mean the Z4 onwards all have remote play built in. They're also the best phones on the market in almost every spec.
But guess what? Sony barely supports THAT either! They never put an aggressive marketing campaign and they've barely broken through with US carriers, so the line has a paltry marketshare.
So, to answer the OP, they pretty much already did the Vita successor, and they gave up just as quickly.
Let's leave them to the PS console line, shall we? They're a very fickle company as it is, and we don't want them to waste any more money than they already do on markets they're not going to actually try to perform in.
You should check out my YouTube channel, The Golden Bolt! I review all types of video games, both classic and modern, and I also give short flyover reviews of the free games each month on PlayStation Plus to tell you if they're worth downloading. After all, the games may be free, but your time is valuable!
