I want to add to this.
For everyone that says "Home consoles are dying in Japan that's why handhelds/mobile thrive there. Can you tell me why the Vita only sold 6 million compared to the PS4's 9.5 million when last generation it was the PSP 20 million > PS3 10 million? That is a huge failure.
Sony lost two rounds to Nintendo in handheld space. The competition with Nintendo, in handheld space, is tough. Nintendo always prioritizes your handheld public, for they, the handheld is a premium consumer. For sony, the portable space is a sideline product, the stationary consoles have all the sun, for Sony.