This was also going to address some of the Band 2's design issues. The Band 3's clasp was much thinner, so you'd have an easier time slipping it under a shirt cuff. It appeared to be sturdier, too. And charging was considerably faster -- you'd have a full charge in an hour instead of the 1.5 hours of its predecessor. There's RFID tag support, although that wasn't working.

When you combine this with the recent Xbox Watch leak, there's a clear pattern: Microsoft was fully committed to wearable hardware until it made an about face sometime in 2016. While there hasn't been a formal explanation, it seems likely that Microsoft decided that wearable tech just wasn't worth the effort given modest sales and fierce competition. This may also have been part of a broader strategy where Microsoft cut its work on underperforming products (such as Windows 10 Mobile) in favor of more reliable or promising businesses like Windows on PCs, mixed reality, cloud services and the Xbox.