Big thing missing from the line-up: WinRT HDMI-stick.

A Windows-powered answer to the MK808/Ouya/VitaStation and similar products, bundled with a nice wireless keyboard/mouse remote gizmo - something like this: http://shop.lenovo.com/us/en/itemdetails/57Y6678/460/4C2830F...

WinRT's consistent support for keyboard/mouse sets it apart from touch-oriented Android. Wireless handheld keyboard/mouse is hard to get right, but touchscreen without touching is harder. WinRT could be great on TVs.

But MS would worry about cannibalizing their XBox sales.