If the PS3 does everything, what can the PS4 do?

[Persephone]

Well From all that I have read about it I think they need to ditch the entire Idea. First off they are planing to change From a cell chip to a AMD which  means no PS3 backwards abillity. If you ask me they should wait a couple years untill technolagy  can catch up. Right now all gaming consoles are using Unreal Engine 3 which is a fantastic program, but I read an artical about Tim Sweeny the man responsible for creating this graphix and acceleration program and He plans on relasing the Unreal Engine 4. And this hardware will revoutionize gaming. For now on if a game programmer decices to change or add something to the game he doesnt have to go to the developers and the creators and all that time it takes for now on you can put in anything you want right there and then and even check it right there to see if thats what you want, a big big time saver and the lighting effects and details will be better then any pc graphix card can do. So i just see the ps4 as a  big waste of time and money and just like all the systems when they first come out there are not hardly any games that mach the systems capabillities of the new system that are worth buying it usualluy takes them a good couple years to come out with any. If Sony has any great changes it better be pc gaming worthy  cause if not there screwed