When Comcast's gigabit trial hit Atlanta earlier in the year, customers has the option of committing to three years for service in exchange for a $70 monthly rate. Why isn't that available in Chicago? Well, Google Fiber is already slated for Georgia's capital, as is AT&T's high-speed internet. Google's gigabit service hasn't yet made it to the Windy City, but the company did acquire Webpass back in June, a company that has high-speed internet customers in Chicago already. On the Google Fiber website, Chicago is still listed as a potential city as the status hasn't changed since it was first announced in late 2015.

Meanwhile, AT&T's gigabit service is available in Chicago already, priced at $90 a month or $20 higher than some other locales. This increased rate could drop after the trial is up, but it appears Comcast is basing its rates off of the competition in the cities where it's rolling out the speedy internet service. As the option becomes available in more places, it will be interesting to keep an eye on how the rates vary. What's more, Comcast's faster 2Gbps service, Gigabit Pro, is already available in the Greater Chicago area.