If anyone else is having this problem, I managed to solve it by installing the Chuwi Hi8 Windows driver for Broadcom 802.11n, extracted from here https://mega.nz/#!dA8y3JpL!t25ytdn_rGUosjZtW-ej4SoBrYQPt2QwCZFo-SwjcII – and now my Chuwi Vi10 Pro (running Windows 8.1) can detect my Microsoft Wireless Display Adapter, yay!
I like the adapter. It’s not as responsive as micro HDMI output, but it’s pretty good for streaming videos. Haven’t tried gaming (and I don’t game) so can’t comment on that usage.