Yeah, but then... Some actual Neo Geo games from back in the day weren't Neo Geo games either - esthetically and technically. Yet, they are there, and have been there for 20 years now.
I don't think "Neo Geo games" as you mean them are ever going to be done again, if only because, with the tools publicly available today, I can't see any developper submitting to early system rom limitations that make no sense today... So if we go that way, there shouldn't ever be any more games released on the system. Which is a position I always find a bit odd.