The leak screenshot features some apps that are present on Mac like the preview app and the textedit app. The interesting new app in the screenshot is Healthbook. We really don’t know how that app will function but it will probably act like the S-health on the Samsung Galaxy devices. Because of this app, it gives us a clue that Apple might release a wearable device this year. Expect more changes once the next version of iOS is out.
Good luck Apple!