Speculation continues to mount that Microsoft will launch a fitness tracking wristband, rather than a smartwatch before the year is out.
Thurrott suggested the difference will merely be in the form factor, with notifications from smartphones and live date from the device appearing on a longer, slimmer display rather than a more traditional watch face.
The blogger goes along rumours claiming the device will include a multitude of health-oriented sensors, tracking variables like steps, heart-rate and the like.
Thurrott's sources also back up perhaps the most significant rumour; that Microsoft's offering will be compatible with Windows Phone, Android and iOS.
It's also likely to differentiate from the forthcoming Apple iWatch or iBand tracker, which is only expected to pair with iOS devices.
Would a platform agnostic Microsoft smartwatch tempt you away from your smartphone OS loyalties? Let us know your thoughts in the comments section below