Wlll any of the lost features of the PS3 return on the PS4?

[zaMy]

I think they will have an advfanced PSN by then, PS2 and lots of PS3 games will be available through there.

I hope they build the PS4 right, and re-use most parts for the PS3. PS3's life cycle is almost half over, and it hasnt even used its full power on any game yet,.