The real trouble comes with Comcast's approach to net neutrality. The company landed in hot water with neutrality advocates last month when it announced that its wouldn't count against users' data caps. In essence, users who watch lots of streaming video through other services, such as Netflix, risk hitting the cap and paying an overage fee, while users who stick with Xfinity can stream as much as they want, worry-free.

The writing's on the wall: If you're going to cut the cable cord, Comcast has a plan to get its money back. As with AT&T's for home broadband, precedent is the issue. You may not use 300 GB at the moment, but streaming video is going to get bigger, inevitably at the expense of cable TV. Service providers are planting the seeds of protection now.

Incidentally, Comcast will offer unlimited data for users outside of its trial markets, while the company tests the new 300 GB plans. Enjoy it while it lasts.

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