It's about time, too. No internet service in America is unlimited these days, every service provider has caps. The only difference being their overage policies and whether they tell you about it or not.
It isn't unreasonable for carriers to try to balance bandwidth demand with restructured plans. It isn't actually possible to build an advanced, reliable infrastructure while not getting paid for its use. The unreasonable part is the lack of rollover, reasonable overage pricing, and flexible plans. Of course, They won't do anything reasonable to consumers without regulatory pressure, as they've proven time and time again. But America prides itself on being a predatory nightmare, so good luck with that one.
The wireless providers in this country are uniformly useless and rightfully despised. It's such a massive soft target that I'm surprised Google hasn't dumped a few billion into the service provider biz yet. Maybe that's just one industry too many to try to buy their way into anticompetitively and mine for advertising data?
Oh well. At least Wifi is getting a little bit more ubiquitous.