It monitors heart rate, exercise and calories. It makes and takes calls, texts and emails. It surfs the internet.

And for Starwood Preferred Guests staying at select hotels in the W, Element and Aloft chains the new Apple Watch can open doors — specifically, the door to your room.

There’s a Maxwell Smart quality to this. (Hey, Rolex — jealous?) The Apple Watch works at Starwood hotels wired for keyless systems where you can open guest room doors using your iPhone or Android. Read more