Why doesn't Comcast use VDI (Virtual Desktop) for this? Give the home a dumb terminal, monitor, KB and mouse.
This would allow browsing the web and save millions in support costs.
I just don't see how you can sell a low end PC to someone and not expect the support costs to go thru the roof.
With VDI you could easily manage tens of thousands of PCs and control the OS at Comcast head quarters. Comcast could open the pipe a bit more from the home to the server then QoS at the data center.
They will probably lock it down and outsource the tech support to India so it will be cheap. That is my guess when they say "dedicated support desk."
Maybe they worked out a deal with Google for the "free" Chrome netbook?