It's technically not Nintendo land.
That PS2 audience transitioned directly into the psp audience.
The current PS4 base has pretty much hit the ceiling, but it has that ceiling because it's a home console in an age when some houses don't even HAVE a TV.
Ok, I can see where the PS2 base was split between PSP & PS3 but where did it go after that?
PSP+PS3 did over 30 million, Vita+PS4 is currently under 14 million.
When the herd loses its way, the shepard must kill the bull that leads them astray.