From what we gather, this is only for DMC4, however, and not a console-wide feature, so don't expect to start bragging about your PSN gamerscore anytime soon. The idea of PS3 achievements, rumored once to be called entitlements, were denied by Sony leading up to the console's launch.
The review also confirmed Sixaxis functionality in the form of tilting to adjust the camera, and noted a 5GB required installation before you can play the game. The 1UP podcast this week also confirmed this, saying it took 25 minutes to complete the installation process, so don't expect to play the game as soon as you get home from the store.
[Update: Upgraded emphasis on 5GB installation]
[Via PS3 Fanboy]