one think is what is possible to do, and other is what they would do.
here in brazil, there is no need for 4k displays, not even 1080p.Now the TVs are starting to show HD images, only netflix uses 1080p.
If 4k TVs wont be popularized in the next gen times, they wont deliver 4k on consoles. But it that happens, there will be no need for a generation leap.
So i im starting to agreeing with DerpSandwich, and also JustBeingReal. This gen will last until 2022+, and the jump will be massive due the new technologies.Nintendo would release a console at 17/18, but will be powered near to ps4 power.