Don't hold your breath. The telecoms have ways of lobbying away disruptive technologies. Also, those VOIP calls are going to be running over telecom provided Internet connections (with the exception of a few circuits by Covad). Unless net neutrality bills pass, ATT or whomever can degrade your VOIP call at whim, or collect a fee from your VOIP provider.
Actually I have experienced that myself... I had this CDMA PC-slot internet card that I used to use, in India. I can tell you that they are definitely tampering with the Google Talk service that normally doesn't use much bandwidth, on a traditional internet connection.