There's no way it can possibly be as impressive in an obvious way the way that the beauty of the CGI applied to the mocap actors back in the the original movies and then on top of that, literally putting 3D glasses on and seeing that world pop out at you.
Avatar was really the first and honestly one of the only modern movies made specifically to be seen in 3D and not just as a gimmick like a lot of those 90's and early 2000's movies. Some will call it a gimmick, but it was a feature of the movie. If we're talking about using 3D as a gimmick, it was all of the movies in the immediate aftermath of Avatar that didn't shoot their movies in 3D, but converted it to 3D because audiences were willing to go and see another 3D movie after seeing what Avatar did. A big example is movies that simply didn't need it and it added no value at all such as the Transformers movies in the early 2010's.
You can trust that James Cameron and Disney's marketing team are going to push 3D for this again though as it's probably the first movie in years to actually be shot in 3D. Also, the sequel has been delayed so long, it's almost at the point of coming out at the right time where it will have a bit of a nostalgia/curiostiy factor to it, too.