Good catch! I suspect it is more like they wanted to convey the message Windows 10 can also be used in embedded applications currently covered by e.g. Windows Embedded Compact 7. Someone in marketing did an image search for "embedded board" or something, and added the best looking image, which accidentally turns out to be a Yun.
Yeah, weird they didn't put in an Intel Galileo or Edison, since those are actual embedded boards that can run Windows (Galileo at least, but I'd be shocked if Edison doesn't run Windows for IoT/devices/embedded whatever too).
Or maybe it's all a secret project to massively slim Windows down so it can run in the AVR's 2 kilobytes of memory. BillG can revise his quote to be, '2K ought to be enough for anybody'. :)
