In theory Windows 8 OS Deployment is the same as Windows 7.
If you attempt to provision devices with UEFI BIOS be aware that Windows PE is strictly 64 bit.
This means that all executables which you execute within PE have to be 64 bit executables because the 32 bit libraries do not exist (Microsoft issue). So programs such as copydrivers will not work in their original form unless you have the sourcecode and can recompile in 64 bit. (For copydrivers specifically I had the source code and recompiled and it worked perfectly so if you need this let me know even though the ability to include .exe drivers is also available in SP1 so hopefully this Tool will no longer be required in SP1)
In addition in LDMS 9.5 HII does not work in the 64bit PE. This is solved in SP1.
But for devices with a Standard Bios it is correct that OSD works exactly the same as it did for Windows 7.