Comcast is testing a new $15-per-month streaming TV service, called Stream TV, but so far it’s available only in the Boston area to Xfinity Internet customers. It will include all the major broadcast channels, as well as HBO and others. The first month is free and there are no contracts required. Comcast says that it will expand the service to all of its areas in 2016. If you’re in the Boston area and have had a chance to try it out, let us know what you think!