Here's the deal, All they have to do is add software that senses motion within the pixels of the video image itself (actually pretty complicated software but available off the shelf). My guess is that as far as I've seen with this company, any chance of that happening before the end of the world is not likely.
If you can handle terminating cat5 jacks then do what I'm gonna do, move the cameras inside......
Comcast if you get this, you need to GET this!
At this point in time I should have known better than to have a cable company do a security company's job. see if you can change that opinion sooner than later......