Monorail Red windows have been changed out, but ONLY a couple for testing.
It is expected that Monorail Orange will premiere with the new window set-up (whatever the final decision is). And it will be the first with the entire train with new windows. Then both Red and Blue will get the window changes, one at a time, after Monorail Orange passes all its tests and the new windows show that the temperature will remain with normal limits with a full set of passengers if the train gets stalled on the track.
When will Mark VII Monorail Orange appear? It is rumored sometime in mid-April (after Spring/Easter Break) for testing, to avoid the peak crowds and delaying the entire system. But that is subject to change, depending on the test results from Monorail Red.
The last I heard, expect windows very similar to what the old Mark V's had as a replacement for the current Mark VII windows.