Awesome thanks for the link. So this is the one intended for the M70-D3?Good to know. I did mine last night. Followed the wifi instructions here: https://support.vizio.com/s/article/Firmware-Information-244 Basically this is the one that should at some point automatically download but follow the instructions for the manual download.
This link states firmware for M70 & M80 and the update went fine; took about 15 minutes to complete. Havent tested any HDR stuff yet.