I wouldn't expect anything like Uncharted 2 or Killzone 2 out of it, but I would agree that I'd like to see some improvement from the beta's. We'll have to see what changes have been made once the final product comes out. Right now, however, I'm more interested in seeing gameplay and balance tweaks more than graphics. Still, even if the graphics never improve, I hope that at least the character animations are improved so that the other players and your arms in first person don't look as stiff.
Also, it'd be great if enough people get into this final beta so that joining 256 player matches will be as quick as the 64 player ones. With both balancing issues versus SVER and a low number of players, playing in the 256 player matches was quite pointless as a Raven soldier in this recently ended beta phase.