Looks like our earlier reporting was slightly ahead of things as build 10586.63 is now live for those on the Insider program and in the Fast Ring. At least for some users.
No word just yet from Microsoft on what is new, but the update is confirmed as going out to our Lumia 950 XL. However, our Lumia 950 on AT&T is not seeing the update for whatever reason and many others are not seeing the update either. Microsoft is conspicuously quiet about this update with no announcement or information.
We'll add to this article as more information becomes available.
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Daniel Rubino is the Editor-in-chief of Windows Central, head reviewer, podcast co-host, and analyst. He has been covering Microsoft since 2007 when this site was called WMExperts (and later Windows Phone Central). His interests include Windows, laptops, next-gen computing, and for some reason, watches. Before all this tech stuff, he worked on a Ph.D. in linguistics, watched people sleep (for medical purposes!), and ran the projectors at movie theaters because it was fun.