Call me crazy, but I think these "upgrades" aren't designed to "extend" the current generations but rather to secure an existing userbase.
I expect the PS5/XB2 to hit the market around 2020. But the difference is that I believe the PS4/XB1 would remain as forward compatible consoles. So even when the PS5 is getting its games the current PS4 will still be getting those games.
People need to remember that the money in gaming comes from selling software, sony probably wouldn't make more than $10 from selling a brand new PS5 but they stand to make way more than that from every game sold at any point in time.
Having the PS4/PS4pro be forward compatible allows them not just make a ridiculously powerful console, but the PS5 could even be priced at as high as $500/$600 with the intention of not selling more than 6-8M of them in its launch year. Then drop the price as the etch inside it becomes more affordable.







