The resources required to create super high quality animations on modern displays are far beyond what it's worth considering most of the time you won't even be looking at the display. Stern certainly could spend more resources on creating higher quality animations, but I don't think that would translate into better sales or even a more popular game. The most important part of a display IMHO is simply that it conveys information cleanly and clearly. I don't care if the animations are basic if I'm able to get the info I need from a quick glance.
For this reason, I honestly would not mind at all if a new game were ever to release with a DMD. Good dots look really nice and require far fewer resources than modern displays. I think we can all agree that some nice DMD animations on Houdini and Octoberfest would have been much better than what we ended up with, but the question is if a DMD would have been able to convey enough info.