Nintendo will only leave if they're forced to, I.E the Switch selling terribly too.
With Microsoft it's hard to tell, they may very well just start to push PC's that essentially act as consoles. Small Form Factor, and modifications to make Windows 10 user friendly with a Gamepad, and other fancy things.
With Sony, the PS5 is coming... but after that? Well it depends how technology continues to advance, but an all cloud future for both Sony and Microsoft wouldn't be unimaginable.







