I'm a runner, so obviously biased, but I implore everyone (to the point of annoyance) to check out some of the cheaper Garmin smart watches. They use MIP displays so the battery life runs about 2 weeks, you get phone notifications, the ability to find your phone, sleep scoring, step counting, heart rate monitoring. Then there's the obvious GPS run recording which you don't have to use. There's more stuff as well but I don't really use that like NFC card payments, music controls, but overall it hits a nice balance of features versus battery life.
For the sake of fair comparison, my wife had an Apple watch, which looked better and had way more features, but the 1 day battery life became such a frustration it sat in a dresser drawer. My last Garmin lasted 5 years with daily use and sports, and only died because I took it into the sea on vacation after the waterproof seal failed on the screen. I replaced it the day I got back with the successor model and couldn't be happier.
I'm not shilling for Garmin (or at least not being paid to), I love the Pebbles and I'm very much looking forward to the launch as I want a more fashionable smartwatch. Apple, Samsung et al have kinda tainted the smartphone market with feature vomit, when in fact there's a lot of good stuff out there, it's just not as hip.