Apple has a great opportunity to introduce the new iMac, Mac mini and Apple TV next month in conjunction with the analog television broadcast shutdown on February 17th. The analog shutdown is going to be big news, and Apple can profit from it.
I forgot about that aspect. Between that and the 25th Anniversary, I think this might be spot-on. I am of the opinion that they will announce all new hardware on the anniversary, and use the next months shut down as a reason to upgrade to the new Apple TV.