Google is rumored to announce its line of Android Wear smartwatches sometime in 2018. Codenames: Angelfish and Swordfish.
Angelfish will be offered in 2 sizes: 42mm and 46mm. The device will be full-featured with GPS, LTE, and heart-rate monitor.
Swordfish will probably be a less-featured device and might lack LTE and GPS.
Above is a tipped design floating around the web.