From what I've read this is going to push through MS UPDATE at some point not much different that a SP.
So I think your embedded Key will be valid.
As far as Installing before its pushed I would check Asus Download for your Model, to see if any new drivers will be required for 8.1 otherwise installing would be a MS issue. If you Google around you'll find guided if needed Try goggling "ASUS Windows 8.1 clean install guide" it bring up lots of information for you.
G752VY-DH72 Win 10 Pro
512 GB M.2 Samsung 960 Pro
1 TB Samsung 850 pro 2.5 format
980m GTX 4 GB
32GB DDR 4 Standard RAM
Z97 PRO WiFi I7 4790K
Windows 10 Pro
Z97 -A
Windows 10 Pro