Interesting - the big question though is whether this will work by just installing an app/service on your phone, or if you are still forced to use the Microsoft Launcher on your phone for it to work. Its not that ML is a bad launcher (its actually pretty good) but it ties you in so heavily to the Microsoft services that it's just not as good as the Google Pixel launcher. Bing is still awful, cortana just isn't as good as google assistant and i've no interest in moving from google drive to one drive.
All I really want is the ability to sync messages/notifications onto my windows PC…which can can do right now, but only with their launcher :( Will try it out when I get the update anyway!