The Google Home web app has introduced a new "Devices" tab for users in the Public Preview program, allowing management of smart devices such as lights, locks, and thermostats from a web browser. Media devices like speakers and displays are not included in this initial rollout. The new interface organizes devices by room, enabling users to toggle devices on and off, adjust brightness for lights, and control temperatures for Nest Thermostats. Further enhancements and additional device types are expected in the future.