seems like it would be different due to the ibooks app being added.
Will iTunes know that the official release is newer than the gold master release? I assume its not out yet as iTunes keeps saying "4.0 is the latest release"
So what will happen when its out?
I had the GM release, then I restored, and GameCenter was gone. Did Apple take it out? I also updated my mom's iPhone (who didn't have the gm release) and it didn't have GC.
Game center was only available to developers which is why it was in the GM. It will be released later this year officially. You can always go back and use the GM if GC is a must have. I will personally never use GC.