We pay enough for a Comcast service and not to be able to mirror it is disgraceful for Comcast to block it this is something that Comcast should allow to satisfy their customers
has zip to do with Comcast it is the right of the content owners to limit how their productions are sold and enforce those contracts. You pay for outlets and get to use any non-tv device like tablets, smart devices like phones, desk/laptops. (note that the desk/laptop can still cast using chromecast or an hdmi connection because they are grandfathered in that the extra device is another monitor for the desk/laptop. You can use the currently free beta for Roku to watch on a TV.