Getting into your car is getting slicker all the time. Remember when you used to have to physically put your key in the door to get inside? Most undignified. Keyless entry remotes were followed by automatic proximity transmitters that unlock the doors for you when you walk up to the car. But even that requires a superfluous keychain dongle. Swiss watchmaker Jaeger-LeCoultre has the answer, but only if you happen to drive an Aston Martin. And have nearly $25k to spare.