Vita is already a dead console. Xbox One will probably be the same, or even worse, sh*t that Vita is. Vita is, now, getting a little more of attention. Really, i like Vita. I just hate that he doesn't have ANY appealing game at all. Sure, there's some games i would like to play and i would give my eye to get it, but to get the console with no expectations about any future game with some relevance, to be released outside of JP, is another totally different story. Wii U also should have any relevant game, later on, otherwise, it'll be Nintendo's next GC.
PSP is a nice choice right now, for some games. There's a lot i like it, and i also love to emulate old consoles, so it would be a fairly good choice, for me. There's the Disgaea games and Spin-offs, my Yu-gi-oh! series whom i love, the Final Fantasies,
Silent Hill and some more games that i can't remember right now.