They’ll get around to closing the realms eventually, but with SoD’s population lower than WotLK 31 weeks into ICC, consolidating Cata realms is probably at the bottom of their list at the moment.
Could be worse, they opened PvP to PvE transfers in SoD for like 1 hour at 2am on a Thursday. Then they said
Aaaand they never came back with an update. Ended up breaking a bunch of guilds where half the people transferred, and the other half were stuck, with no option but to quit or reroll.