Now this is a bit much - Microsoft

From PC World:

Microsoft made 'em do it: The latest Kaby Lake, Zen chips will support only Windows 10
Microsoft is slamming the door on PC builders and upgraders who might have hoped to use the new Intel Kaby Lake or AMD Zen chips for Windows 7 or Windows 8 PCs. Sorry: Both chips are officially supported only by Microsoft’s Windows 10.

Microsoft's mandate is discreet rather than secret. In January, the company tried to shorten its support lifecycle for Intel Skylake PCs running Windows 7 and 8, a policy the company subsequently abandoned after much outcry. But Microsoft’s statements have also consistently included a critical caveat: The latest generations of silicon—specifically Intel’s Kaby Lake chip, Qualcomm’s 8996, and AMD’s Bristol Ridge silicon—will all require Windows 10.

“As new silicon generations are introduced, they will require the latest Windows platform at that time for support,” a Microsoft spokeswoman replied, when asked to confirm that that position was still in place. The goal appears to be to move forward with new features, even if it means leaving some users behind. “This enables us to focus on deep integration between Windows and the silicon, while maintaining maximum reliability and compatibility with previous generations of platform and silicon.”

I get it - Microsoft makes its money by offering a new version of Windows every other year or so. But to actively lock out a customer? This will interest a lot more people in Linux. The software available for Linux is quite sophisticated and robust - all kinds of office productivity, graphics, audio, video applications out there. Industrial Light and Magic uses Linux for their high-end stuff.