Is/Will there be an ISO or installer publicly available for me to upgrade multiple machines without having to download the update individually on each machine? Oops sorry for the top of the page for a probably commonly answered question.
Once you get the download on one machine, you can decrypt the .esd file it downloads and it's an ISO which you can then burn.
The RTM ISO is about, but the ESD that you could grab from MS's site is blocked now.