I don't know, but whenever we have a power cut, it refuses to cook for us afterwards until we tell it the time.

The timer doesn't even need to have a visible clock. It just needs to count the minutes.

One of the creeping features in most ovens/stoves is a "finish dinner by {time} feature".

The idea is that you put an uncooked meal into the oven in the morning, go to work, and it's ready when you get home.

I've never used that feature because the idea of raw food sitting in an off oven would puts me off.

It doesn't even need a timer. It just needs to heat when I tell it to heat, and stop heating when I tell it to stop.

One advantage to a smarter wristwatch would be that it could automatically adjust itself for daylight savings. A watch that always has the right time by constantly setting itself via GPS to the correct time in your location would be a very useful and popular product - I'd certainly buy one.