We have about 60 Windows 7 Professional PCs.
From what i'm reading, you can do a clean install of Windows 10 with a downloadable ISO. But you have to do the in-place upgrade on Win 7 first, which gets your machine registered as a Win 10 device, then you can use the ISO to do the clean install on the same PC and Win 10 will automatically activate with no product key.
So the process would be: Win 7 Pro -> Upgrade to Win 10 via WinUpdate -> Fresh Install Win 10 Pro -> Reconfig PC.
For 60 machines, that's a real pain. We aren't exactly looking to upgrade right now, it just came out 30 days ago. But has anybody read anything suggesting that it'll be an easier process than the above for businesses that own Professional licenses (i know the Enterprise licenses won't have this problem)?