windows 10 update

Wait for the first impressions to come out first before reserving.

From Windows 8, probably. From Windows 7, wait and see.

You do want DX12 Right?

I read somewhere that after installing the Windows 10 upgrade, reverting to Windows 7 will be possible.
Can't remember if this was from an official source or not...

no need to stay on an 6 year old operating system.
8.1 just need two weeks and after that it is a great os. i think it will be the same for 10.
also some new features like dx12

pretty sure once your turn your copy to windows 10 your key will no longer work for 7 at least that was how it was described in the beginning.
that said 10 looks pretty solid and is the last version of windows to be made according to M$ so we will all have it at some point but ill liklt hold off a few months and let them work through all there security issues every new version comes with.