A suitcase that has already weighed itself. It stores the flight tag, and because it knows which airline you are flying, it tells you your allowance against its own measured weight before you reach the counter. Not at the counter, with a queue behind you, repacking a case on the floor.
A stove that needs no lighter because it ignites from stored heat. If a breeze puts the flame out it cuts the gas itself rather than filling the room. You leave milk heating and it catches the boil over as it starts, before the pan burns and the stain sets.
The through line is the same argument as automotive, applied to objects that cost a few thousand rupees. Nobody has to be paying attention for it to work.