Re: I don't really see the point of this
And the fact that it starts automagically without checking if there's anything actually IN the cavity... I mean, who wouldn't, with this level of convenience, scan the barcode without reading the instructions before putting the thing in the oven, just to see how long it's going to take to cook. Never underestimate the laziness of people.
"Ooh! I fancy lasagne ping tonight, but I need to eat in the next 30 minutes or I'm not going to have time to shower before my big date... How long does this... *click* *scan* BOOM†."
†OK, microwaves don't go BOOM if you start them empty... more kind of fizz, pop, whirr, grind, fizz.