I'm not sure it's a downgrade. Consoles are consoles, about the only thing between them atm is the games that come out for them. Everything that looks remotely interesting seems to be on the ps4.
Halo is bad now, haven't played Crackdown, and I can just as easily play backwards compatible games on my PS3. Trust me, y'all have better exclusives. Also, it doesn't need back comp.