I don't understand why Sony have done this. The objective now is to enable play of some PS3 games on PS4. But I can't see that being a huge attraction as more and more PS4 games come out.
So if we go to PS5 are they going to have streaming of PS4 games and not have any backward compatibility again? I'd rather have the latter.
PS now works on newer selected bravia TV and selected Samsung TV sets. PS vita, PS vita TV etc. So I do see where they are going with this...
Being able to play PlayStation games without a console on your TV with just a ds4 controller does sound appealing if all you want to do is play some previous ps3 titles and not have a ps3 under the TV.