PS3 still has a good few years of life left in it..
The Next gen consoles are still 3 - 5 years away.
I guess time will tell! And although I agree that there is still alot the ps3 can still do but in the link I post they saying that the reason for the launch of the ps4 is because of the lack of memory available on the ps3. Now I dont know how true this is because the ps3 was launched about 10years ago and it could be just that. I am hoping the ps4 is not going to be launched because I recently bought a ps3 which means it would be kind of a waist lol