In preparation for the death of Games of Windows Live (GFWL) service and also the arrival of Ultra Street Fighter 4, Capcom has now completed the transition of Super Street Fighter 4 Arcade Edition to Steamworks.
With this, the PC version of SSF4AE will now be fully reliant on the Steamworks service for matchmaking and in-game purchases. The patch has rolled out as of May 30 and is around 850MB. Owners of GFWL version of SSF4AE will also be able to activate their game on Steam with their CD key. Unfortunately, DLCs and items purchased via GFWL will not be carried over to the Steam version.