To be fair, Microsoft has been warning people for ages that Kaby Lake will not run on anything older than Windows 10, but Vole is also warning punters that AMD's incoming Zen chip will be going the same way.
Microsoft said that as new silicon generations are introduced, they need the latest Windows platform for support. This will allow Microsoft to focus on deep integration between Windows and the silicon, while maintaining maximum reliability and compatibility with previous generations of platform and silicon.