Dedicated handheld consoles were bound to be impacted by smart devices and tablets, and Sony was never a huge contender in the handheld segment with only one console that sold pretty well before the Vita. With the market taking a turn towards more digital solutions requiring more storage, large multiplatform blockbusters, and large 1st party AAA titles to move hardware, and subscription based models taking over more and more, the more static home console market was always more important to Sony. And it's where they have almost all of their gaming pedigree and presence as well. The PS4's success is easily more important and impactful than the PS Vita's somewhat predictable demise.