That's certainly easiest, yeah. You can clean install very easily after you've done the upgrade procedure on the new equipment. Make sure 10 is activated before you wipe.
You don't need an ms account? I thought that's what the key gets tied too.
You really want that MS account so important information can be automatically backed up via onedrive. FWIW your hardware id is what windows uses to activate during a clean install once an in place upgrade has been performed and activated.
....Nah. I don't want my stuff on MS servers, personally.
How does MS treat a clean install of a win8 upgrade licence? Will it be a retail licence as far as win10 is concerned or something else?
Do you mean "from" an Windows 8 upgrade license?
In a sense, every free version offered right now is an upgrade. But this time, after you run the upgrade to Windows 10, a snapshot (for lack of a better word) of your system is taken, so that now you can do a regular install with Windows 10 copied to a DVD or Flash drive, and it will active when it sees that it's your system. With Windows 10, there is no longer an upgrade version (at least not now).
No I meant 'of'.
I used to be a firm believer in the retail version of the software until MS blocked my vista ultimate key because they said I'd abused it by activating it too many times. They didn't care that it was a retail version that allowed me to move around on new hardware and they didn't care that bios updates forced me to reactivate it several times along with hardware failures. Ever since then I've made it a point to acquire oem and move it as I please until they block the key. I will never again pay more for them to shut me down anyway.
Microsoft isn't doing anything with your license for Windows 8. It's the same as it always was.
As to your question about Windows 10:
The OEM vs Retail status will stay the same: Retail you can upgrade/change. OEM will only work with the hardware you have.
The version (Home, Pro, Ultimate) will also stay the same.