There's been a lot of debate as to what the killer feature for the Apple Watch would be. A lot of people have said that there is none. A lot of people have decided that it's unneeded. In the end though, the conclusion that makes the most sense, is that the Apple Watch's killer feature will be decided by the developers that are making the apps for the watch. I've had my Apple Watch almost since launch and have myself gone through a few different killer features. Communications are fantastic, using it for commutes is pretty killer in itself, traveling with it is a great feature, and using it for rewards programs and Apple Pay also makes a really compelling case at a killer feature. Lately however, there's been a new breed of Apple Watch apps
For a few years now, I've been toying around with "Smart" home accessories. I have Philips Hue light bulbs, and accessories, I've owned various Belkin WeMo switches, and have recently jumped into the Wink ecosystem with their Aros Smart Air Conditioner. In many ways "Smart" isn't the correct way to refer to these devices or a home powered by them. We're still in its infancy and many of these devices don't offer much more convenience than normal "unsmart" devices. A better way to refer to them are connected devices, which is a more apt description. They are connected to the internet, bluetooth, or both giving you unprecedented access to your appliances and in some cases more convenience. However, they do fall into a few pitfalls, and this is just my experience with the connected home, and integrating them into my life and my wearables.