Apple's media event has now finished, where we were introduced to a new 12-inch MacBook Air that is thinner and faster than ever, as well as a much more detailed and price run-down of Apple's first wearable, Watch.
With the newly released iOS 8.2, Apple has forced an Apple Watch application to your homescreen. The app itself doesn't do anything, as Watch doesn't launch until April 24, but this isn't just a forced app. This is an advertisement, forced onto all iPhone users, for Apple's largest launch since the iPhone.
You can't delete it, you can't remote it, it's an app that will stay on your homescreen for the foreseeable future.