I think changes should be from PS3 to PS4:
- More cell processors - Cell is very powerful.
- New GPU with more RAM - 1GB????
- More RAM - 8GB???? Abandon RDRAM and go with DDRx RAM.
These should not changed.
- PSN free
- Hard drive upgradable - I hate 360 for that. Have 20GB, can only install 1 game at a time.
- Compatibility with current hardware - controllers, eye toys, etc.
- Wifi and ethernet port