Power Switch that will Auto power on after power failure?

Figured it out.

Create a Smart Lighting rule:

What to Control: Aeon Switch
What to do: Turn On
Select trigger: switch
Which switch: Same Aeon Switch
Turn lights on when: Switch is off

It would be easy to test. Unplug the Aeon switch, then plug it back in and see if it turns on. The polling should cause the trigger.