It’s really interesting solution, not intended for Microfwk boards, but it works very nice for Raspberry and for Toradex.
It can display signal from HDMI, VGA and 2 AV (composite video) input.
Cost is very affordable, LCD 7" + driver board is $51 + shipment DHL
Don’t know for sure that it’d work, but as long as you were able to power the LCD separately, and can get the module to output a VGA signal within the range for the LCD, I would think it possible.
That’s not a plain vanilla NETMF solution, though.