Intel has recently announced the new 7th Gen Core platform nicknamed Kaby Lake. Going forward from Kaby Lake the only OS that will be supported is Windows 10. If you have a customer that buys Kaby Lake hardware and tries to load Windows 7, IT WILL NOT WORK.
The upcoming Lenovo ThinkPad E570 is Kaby Lake; no downgrades to Windows 7.
AMD's new "Zen" line of processors and chipsets are the same - Windows 10 ONLY.
More info @ PC World