@oralloy,
OK, I saw Infinity War myself now.
My assessment of the 3D was that it was very well done and the movie is definitely worth seeing in 3D.
However, I'm not exactly sure why the reviewer was "stunned and impressed" with the 3D aspects of the ending. The 3D was certainly well done, but I don't know what about the 3D aspects of the ending warrants the phrase "stunned and impressed".
I was stunned and impressed with the 3D aspects of Doctor Strange. By comparison Infinity War was merely very well done 3D.
The Dolby Atmos sound was also good. If you can picture the difference between stereo and mono, it made "normal" surround sound feel like mono, with this feeling like stereo feels in comparison to mono.
And one other point that I better make sure everyone understands: This is a Marvel movie. The last scene will come at the END of the credits.
I sort of figured that everyone would already know that, but 90% of the people in the theater left when the credits started rolling, and they all missed the ending of the movie.