Xfinity gateways XB7 and newer can now act as motion sensors in your home. | Image: Comcast Comcast is bringing Wi-Fi motion sensing to millions of routers that are already in customers' homes, turning the devices into activity monitors. A new update to the Xfinity Internet app, arriving tod ay, August 18th, enables the feature on compatible Xfinity routers at no extra cost. Announced as part of its new Xfinity Shield service, WiFi Motion can monitor activity in your home and send you notifications, similar to a standalone motion sensor. It works by detecting disruptions in the Wi-Fi signal between the Xfinity gateway and any Wi-Fi-connected device, giving you some insight into what's happening in your home without buying addition … Read the full story at The Verge. ...read more read less