Well, I guess I put my foot in my mouth. I had no idea DirectX 11.1 was even a thing, nor did I think Microsoft would keep some tech like it exclusive to its latest OS, but sure enough...
http://www.neowin.net/news/no-directx-111-for-windows-7-planned
http://www.neowin.net/news/no-directx-111-for-windows-7-planned