This small 2.8 inch touch screen can be mounted together with a Pi Zero on a wall. In addition, there are already many touchscreen extensions for the Raspberry Pi and Pi Zero, but often without an elegant housing for wall mounting and usually with larger screen diagonals and therefore not in the compact size of a light switch or thermostat. This makes the AZ-Touch Pi0 particularly suitable for small applications in the field of home automation, metering, monitoring, control and other typical IoT applications.
It looks really great!
Mike from http://netip-ny.org