Playing with the preview, I do like what they have done to combine Windows 7 features hiding a lot of the Windows 8.1 features in the background. I look forward to the new system. As Vinnie said, I am excited to see how DX12 develops, especially with the hope of unified gaming.

http://www.extremetech.com/gaming/198050-microsofts-windows-10-free-upgrades-xbox-streaming-os-level-video-capture