I'm not buying that, because if that's all they were interested in they wouldn't be investing the billions they recently publicly talked about in a new broadband infrastructure that will boast speeds of 100 mbps.
In fact my city (Ann Arbor, MI) is in the running to be the one of the first they are going to build the network in. Of course it doesn't hurt that Google's Ad Words office is located here either, which employs over 1,000 people. So they're more inclined to take care of their own first.
So for better or worse Google is extending their reach into the hardware and infrastructure business and as I said earlier today, this all boils down to control.