I'm about to make that call myself, my introductory rate is up next week (2/6). I'll be good keeping my bill as is, not really much they could try to upgrade (U450, phone, max plus). I already ran the alternative numbers compared to my promo rate:
Cable is a couple bucks more Dish and Cable internet and phone is $25 less Directv and Cable internet and phone is a couple bucks less
Truth be told if I dumped ATT I would probably research ditching everything and just going with internet service from cable. I'm not too keen on slapping a dish on the house and no way would I ever go back to cable TV.