SM would pose other issues as there are many video captures from the movies in the DMD animation. Technically that would need another approach entirely. It almost makes more sense to just use the LCD screen to play the actual video sequences at that point if there was some licensing allowance for that. And, of course colorize the scoring, fonts, etc.
I'm almost thinking it would be cool for the next generation of video enabled Sterns to maintain the DMD sized display area as it would lessen reflection and hopefully not introduce huge distraction to the player. The only drawback I see (if you see it as one) is a less garish than possible attract mode vs a 26" screen, as well as less opportunity to place ads on the display, which I personally am not enthused about anyway.