Comcast is turning millions of its routers into motion detectors

“Comcast is rolling out a free Wi‑Fi motion‑sensing feature to Xfinity gateways (XB7 and newer) via an update to the Xfinity Internet app. The technology monitors disruptions in Wi‑Fi signals between the gateway and connected devices to infer movement, effectively turning existing routers into motion sensors without additional hardware. Marketed as part of the Xfinity Shield service, the feature also bundles advanced security and parental‑control tools at no extra cost. Expert Analysis: Leveraging existing broadband infrastructure for home monitoring gives Comcast a competitive edge in the smart‑home market while sidestepping the need for separate sensor hardware. This could accelerate adoption of ISP‑provided IoT services in the U.S., pressuring third‑party security and sensor vendors to partner or innovate.”