Development continues on TF2, now like eighty years after it's been released. I'd be upset if I bought it on PS3 or 360.
But for us PC players, the sniper and spy are getting class updates, following the updates for medic, heavy, pyro, and scout classes. Pretty soon they'll actually have done all the classes, and they'll have to move on to another game or something.
Sniper and spy details can be viewed here.