Many new features are coming with Windows 10 Anniversary Update, like the ability to unlock Windows 10 PC with Phone and Microsoft Band. The interesting thing about this feature is that you can use an Android device to unlock your Windows 10 PC.
“Use your Windows Phone or Android phone as a remote credential store which can be used to unlock any of your Windows 10 PCs and authenticate with apps and services that support Windows Hello and Microsoft Passport-based authentication.”
Another feature that is coming for Windows 10 is the ability to use your Microsoft Band 2 like Windows 10 Companion Device Framework to unlock your Windows 10 PC.
“Use your Microsoft Band 2, or other devices that integrate with the Windows 10 Companion Device Framework (CFD), as a companion device for Microsoft Passport-based authentication. With this a device like the Microsoft Band 2 or other third party devices, they can become an external second factor of authentication which can be used to unlock your Windows 10 PCs.”
Again, these features are currently in development and may not make it to the final release. Windows 10 Anniversary Update is expected in July 2016 and a second update is slated for a 2017 release.