Consider this new app that item that someone placed on store shelves before it was time to begin selling the product. You can look at it all you want, but until that launch date comes, forget about it. In this case, HTC has released a Zoe app into the Play Store, but it doesn't plan to activate it until this summer.
There isn't much to take away from these screenshots, other than a green battery icon that drills in just why Google required everyone to switch to white notification tray icons for Android 4.4. Given that the current versions of Sense have a white icon, this looks like very early, or hasty, work.
The HTC One introduced Zoes last year, small bursts of photos that form short videos lasting only a few seconds. They're making a return for the M8 this year, only HTC plans to evolve the feature into a cloud-based service. Users will be able to upload videos and share them with others, probably akin to HTC Share. We'll know more come this summer.