Are you going to get this update?
If you do, please post your ATI model and let us know whether you noticed any performance boost in HL2 or CS:S.
Ideally, you'll write down your current Catalyst driver version and run HL2, noting the framerates. And after the upgrade, run HL2 again with the same display settings and record the framerates at the same location in the game.
I am curious whether this upgrade actually makes any difference.