Earlier I saw some brief information about some “BIOS to UEFI” feature that Microsoft was adding to some product of theirs, but had no idea what it was about. Here is a bit more information on the System Center feature:
https://firmwaresecurity.com/2016/09/28/microsoft-working-on-a-bios-to-uefi-feature/
“Improvements for BIOS to UEFI conversion
You can now customize an operating system deployment task sequence with a new variable, TSUEFIDrive, so that the Restart Computer step will prepare a FAT32 partition on the hard drive for transition to UEFI. The following procedure provides an example of how you can create task sequence steps to prepare the hard drive for the BIOS to UEFI conversion.”
https://technet.microsoft.com/library/mt772349(TechNet.10).aspx#Improvements-for-BIOS-to-UEFI-conversion
Firmware Security 