Pity we don't have any serious responses. Mine is this:

I'm a magazine editor. I write about smart-home technology -- things like smart thermostats, smart lights, home theaters and security. You know, like you say, "Goodnight" and the lights turn off and the security system arms and the thermostat turns back a few degrees?

At this point they usually go: Oh, like the nest thermostat? And I say, yeah, like that.