I think both Sony and MS are planning that they will never break compatibility between two 'gens', rendering gens meaningless in all practicality, so that PS4/XBONE games will play and PS NEO/XB Scorpio and even potentially whatever comes next (call it PS5/XBTWO). Just that those new console will look better and better.
So while PS5/XBTWO games may not play on original PS4/XBONE they will play on the NEO/Scorpio at lower res.
I _may_ buy the NEO after one or two years of it's release if and only if I end up buying a 4K TV. I have no plans to buy a 4K TV within the next 5 years, but I won't say I will absolutely not buy one in the next 5 years.











