Comcast has announced a new TV streaming service called Stream, which will give existing Xfinity internet customers access to "about a dozen networks" across a range of devices for $15 per month.

Stream will let subscribers watch TV shows from HBO, Fox, NBC and other unannounced networks on laptops, tablets and phones, provided they do so within their home while connected to their Comcast internet. As well as access to live TV, Stream will have a library of thousands of on-demand movies and TV shows.

The service will also come with TV Everywhere, giving subscribers access to various apps associated with the TV networks Stream includes. There will also be cloud DVR functionality to record live TV and watch it at a later date.

Comcast will first launch Stream in Boston at the end of the summer, followed by Chicago and Seattle. In early 2016, the company hopes to offer Stream across their entire United States network.

While Stream only costs $15 per month, the service is quite limited in who can access it: you'll need to be a Comcast internet customer, using the service through your Comcast connection in your home, to watch the various channels it includes. This differs to Sling TV, which streams a larger range of major cable channels to anyone in the US for $20 per month.

With that in mind, it will be interesting to see how many Comcast subscribers and cord cutters pick up the company's new Stream service when it launches in the coming months.