Developers don't give a damn about generations anymore. How many years it takes for Sony to replace their consoles wlll have little impact on game development, which will regardless target weak-ish hardware as the main spec then scale up.
Generations don't pack the same punch as before, we just need to accept that and move on. Sony has no power to control game developers, no one does. It's actually a dream scenario for publishers to scale to as many hardware as possible, including mobile phones which will be like two generations behind stationary consoles when the PS6 hits the market.
Look at all these crazy Chinese games running on mobile phones...








