Had been running PI on the Developer's preview on an I7 machine. I'll check if it is still running on the latest builds. I had to roll back the latest build on another machine.
I just tried it and it did not activate.....
I am not sure W10 is ready for prime time next month and would not rush in. Supposedly the kernel will change but most of the drivers will remain the same was W7 and W8.1. It will automatically update and W10 may be the last version... like OS X with Macs.
If you have a secondary machine, may want to try it there first.
This is a good place for some of the inside story:
https://www.thurrott.com/windows/windows-10A bad thing IMHO is the lack of the W7 backup and disk image system... depreciated in 8.1...
Latest build for me is 10074