I'll let you in on a secret... people (as in the vast majority) don't want 3D in theaters either. The reason it's there is because it's an excuse for even higher ticket prices. Raise your hand if you actually believe people would not see a movie because it wasn't showing in 3D. Anyone? Would you? Would you walk into a theater, and find out that the movie was not playing in 3D, and turn around and leave? Checking my local cinema's showings for tomorrow (it has 8 screens), there is only one movie being shown in 3D tomorrow: XXX: The Return of Xander Cage (PG-13). And that's with a 2D showing mixed in with the two 3D showings.
So when the article says "Despite enthusiasm at the box office", I think that should really say "Despite not utterly failing at the box office".