Some interesting tidbits here. Microsoft has trademarked a ringtone that also appeared in leaked Surface Duo developer promo. So, it seems that it may be the signature ringtone for Surface Duo.

Coming to the next interesting tidbit, you can check Windows 10X OOBE or the boot-up animations and steps in the video below. Though it is not complete but it does pack some new and interesting animations.

Windows 10X will pack a new music control UI as revealed on Twitter.