Monitor via camera the status of your home while you are away on travel (or possibly, due to storm evacuation orders).
Turn on or off your house lights and set the dimmer level using voice control.
Check on the temperature of your home (while you are away from it) and adjust the temperature as needed (possibly based upon the timing of your return). So running the heat or A/C can be minimized while you are not there.
Control the synchronized playing of music throughout a home via a Media Server from the convenience of an iPad or tablet.
Keep watch on the activity of a parent or friend whose health is less than optimal.
Remotely open your garage door to allow someone to enter your home.