Predicting the future is always a hard thing, especially in pc gaming for 3 years from now.
If you are ok with playstation 4 gmes quality and fps, then why don't you just get one? Its simpler and more focused on gaming. Theoretically a pc with similiar quality settings (different on each game) should be ok with GTX 950 or probably even GTX 750 Ti. That should not change in 3 years, not in 5 years, as the PS4 hardware will not change too. So a GTX 970 will be more than enough. Theoretically.
So, why do I say theoretically? Because it is. 😀
There is more than hardware equivalents. Games can be more optimzed to a console, because the hardware and software on it is exactly the same for all (those parts relevant for performance). The...