While I agree Stern should have a color display, in fact we were hoping since at least 2013 ST (?) I believe.
But the point being, likely GB will get a color DMD, so not as good as a real live footage in Hi-Definition but somewhat OK.
Also, look at a game like TAF. Are you telling me if that pin came out today, people wouldn't be all over it? I view that as similar to GB (both have no color display native). I'm not saying GB will be as good as TAF not for me to say, but just pointing out you wouldn't tear down TAF if it was released today (as is), so while yes GB's display is lacking it's not a death blow. And in fact, I would go so far as to say that some people will buy TH simply because it has a nice display and looks nice. It could be just like Bug Bunny Birthday Bash in every other way but some people would buy it simply because it looks great and has a much nicer display than GB.
I'll go one further, people like South Park pin. I'm not sure why, but some people do, and I know it probably grabs quarters on location. Same with IJ4, but that doesn't those are great pins. But people still put money into them on location and some people honestly do love both those pins.
Not saying GB = TAF or that TH = South Park. Not even trying to get near that. But just pointing out that TAF is great without a full color movie footage and that people do put money in SP just because they like the theme and it probably sold OK (I have no idea, but the point being even a not so good pin can still be very successful).
It's far too early to speculate (maybe this time next year it will be clearer) but some people will like both, some will like one more than the other and some people won't like either.