Good idea. I've been thinking about doing this because my wife and I need different seat positions.
Our BMW had automatically adjusting seats for each of us. As we approached the car and it recognised one of the keys, the seat position, back rake and door mirrors would start to move. Other settings for each of us were remembered, such as choice of radio channel, heating etc. The car display showed a message, Hello Neil, or Hello Janet. Self parking was fun. This was a car that cost approximately the same as the Jazz EX.