Control thermostat based on time, outside temp, room activity
Monitor temperature in any / each room or area of house
Control air vents based on time of day or motion detectors
Measure power being consumed by whole house or single device
Monitor when and where water is being used.
Turn power and devices off when not in use / nobody is around
Reminders when it is time to change air filter, smoke detector batteries, check fire extinguisher
Open –Close – Rotate blinds to block sun, let in light
Turn off hot water heater when hit vacation mode – auto turns back on when you are coming back (based on button from phone, preset date, or detection of your arrival.