Oh yes being backwards is a huge selling point, Well here is another point to consider the PS4 was not retro-compatible and it sold very well mostly because of its good exclusives, the problem is that Sony realize that the new consoles dont need to be fully retro-compatible, as long as they had good games they know the console will sell well, for the up copming generation Sony admitted that a lot of people purchased and some still are still purchasing PS4 consoles so giving support and being retro compatible is the right option for them.