This game might be considered more true to the canon by Fox, or more significant, because it links directly to the films and their settings, where as other games didn't. Other games were separate events with occasional references to the movies, but Aliens:CM is wedging itself in the actual movies timeline, so that's probably why it's garnering more attention about it.
It'll be interesting to see what Gearbox do, though. Explaining the egg on the Sulaco would be easy to do with this game, but it'll be interesting to see how they explain why Hadley's Hope isn't a crater.