That might accelerate the switch over. While there is no real reason given why Microsoft decided to change their policy on Windows 8 / x86 (originally they req

That might accelerate the switch over. While there is no real reason given why Microsoft decided to change their policy on Windows 8 / x86 (originally they requested Secure Boot enabled and enforced), I suspect it was due to their large corporate customers. They feared that after the Win8 release they couldn't buy machines without Win8 Logo (probably right) and thus can't image the Windows 7 (or even older) they still used internally onto new machines. So Microsoft gave them some more time to make the switch, and with pushing Windows 10 like this, they want to purge old Windows versions from the market, and quickly. In terms of Secure Boot this means that there's no business case (for Microsoft) anymore to keep non-Secure Boot around.