What's really great about this is that it's a joke on the future that's been predicted so many times already, my favorite of which being the last vignette on Disney's Carousel of Progress. The future family is talking about points in a video game, and the oven hears it and turns the temperature way up, ruining another family Christmas dinner - the joke being that this convenience was finally going to make Dad able to not ruin dinner.
I remember this joke going way back to the DOS days. The story goes that a developer was demoing his new voice control system for the computer when from the back of the room a voice shouted "FORMAT C COLON", followed by another voice shouting "YES".
There's an SNL skit from the 1970s with a (vaguely) similar premise. The short-order cook takes the order when the waitstaff yells out "cheeseburger". A patron doesn't want a cheeseburger as it's too early. The waitstaff says that it's not too early and everyone else has ordered a cheeseburger, and points to the other patrons exclaiming for each "cheeseburger". Which causes the cook to start making a large number of cheeseburgers.
