If the angular image size (which is determined by the aspect ratio, screen size, and viewing distance) increases each time, it's accurate to say "you can now see even more of the movie."

And that is typically what happened. Typical 16:9 flatscreen TVs at home offer a larger angular image size than the typical 4:3 CRTs did. And typical 1.43 IMAX viewings offer a larger angular image size than typical 16:9 flatscreen TVs.