From this point on (sounds ominous, doesn't it) new CPUs from both Intel and AMD will not offer support for Windows 8 or earlier. Technology moves at a fast pace these days anyway, and things become obsolete more quickly, but it's interesting to get a sort of official notification from the big two chip makers. Any new chips are being made with Windows 10 in mind. Period.
Installing these operating systems on newer hardware should work for a long time, but certain capabilities won’t function. Things might be slightly easier on AMD’s side of the fence, since GPU drivers are typically a major component that quits working between operating systems, and AMD will continue to provide discrete graphics drivers for Windows 7 and 8.ExtremeTech