Quoted from Coz:
A few months ago CGC said that they would NOT have the larger screen on the MMr. Of course things can change and maybe it will be available as an add on to previously built games and optional on the new run that should be built 4th quarter 2019
When they say there will NOT be this or that. You can bet you wallet they are testing it and it will probably be out. IIRC the conversation was about the next run of MMR's coming end of this year. (Keep that in mind) when they said they would not have a larger screen on games coming out. Sounds like one more run for 2019 with regular DMD and would guess 2020 will be the year they reveal the XL DMD. I have no real info other then what would make sense.