Yes .....However..........
I think James Cameron is on record saying that sometimes he prefers the 1;85;1 image of his movies that were shot in super 35. Avatar was masked off at 2.35.1 for cinema but 1.85.1 for dvd.
I think that the new Blu-ray of top gun was also messed about with by Tony Scott before his passing with the black bars masking more of the image than the last DVD release. I prefer the more open matt versions my self of Super 35 movies but want the full widescreen treatment of films that were actually shot that way like most of the bonds, the first Ghostbusters ect.
Plus most movie shown on TV now are except sky movies are shown in either a less pan and scanned version but opened up to the 16:9 tv ratio, or are the super 35 open matt versions of full 2.35.1 movies.
You only have to see something like T2 when it is shown on terrestrial TV to see that.
To be honest, with IMAX now. there really is no need to shoot any movie in full widescreen, as I think IMAX fills a 16.9 tv without the black bars when viewed at home.
If you want a really strange experience, watch the new Transformers movie. The aspect ration is constantly changing during the movie!