Sony has confirmed today that they have personally given up on their pricey handheld, the PS Vita. They have no further 1st party support planned for the handheld with all focus on the PS4.
This leaves the 3rd party game makers to keep the Vita afloat.
Can't blame them. As for how long it'll last... I give a year or so. The console has already sold virtually no units, and I doubt third parties will keep supporting an abandoned system that even the console creator seems to have given up on.