Did you sign up for your new battle.net account?

[Archon_Wing]

It is quite useful in case you don't want to use cds anymore. Simply enter your cd key for the games you have, and you can download it from the site if you have to reinstall. Though that has been around for a while with the Blizzard accounts, so whatever this update is seems pretty underwhelming.

Though it would be easier to banstick cheaters in future games though.;)