Not every announced application is ready for end customers. Here each use case is shown with its current stage, to separate product from promise.
Alerts when there is movement in a home that should be empty, or confirms someone has arrived. The most mature application. Comcast began rolling it out in August 2026 on XB7 and newer gateways, as part of Xfinity Shield, at no extra cost. Plume has offered sensing to operators since 2020.
Smart bulbs from brands such as Wiz and Philips Hue already use their own Wi-Fi radio to sense presence and switch lights on or off. The same principle can adjust heating and cooling to occupancy.
Following the activity pattern of someone who lives alone and alerting family members to unusual inactivity or a changed routine. Operators point to this as the next step. Fall detection still has error rates that call for caution.
Estimating how many people are in rooms, shops, residential buildings and venues, combining device-free sensing with passive device observation. Useful for staffing, cleaning and climate control.
An extra layer for alarms, without cameras. It does not replace a monitored security system: Comcast itself treats it as a feature, not a security service.
Breathing and heart rate have been measured with CSI, but under controlled conditions: a still person, close to the link, in a stable room. Still far from clinical or commercial use.
Recognizing gestures, telling sitting from lying down, identifying activities. Promising lab results that struggle to generalize to new rooms and people.
Knowing where in the room a person is without them carrying anything. 802.11bf at millimeter-wave frequencies opens the way to finer spatial resolution.
Wi-Fi sensing notices that something in the room has changed. It does not see, does not recognize faces and does not guarantee detection like a dedicated sensor.
If the customer needs images, identification of who is present or contractual detection guarantees, as in monitored alarms, sensing is a complement, not a substitute. Selling the technology beyond what it delivers is the shortest path to frustrating customers and burning the category.