At Cable Show 2011, Comcasts CEO Brian Roberts showed off a demo of the company's latest improvements and upgrades. The presentation above shows off Xfinity TV with cloud processing and internet content from facebook and others. There was also a speed test running on Comcast production network that broke through the 1Gbps barrier. There is no word on when or if home users might see such speeds but Roberts quotes:

Comcast will keep up the pace as the internet continues to evolve

We will half to wait in the meantime to see if any of this comes true in Q3-Q4.