You may recall a time when home videos had to fit onto square TVs, not these flat rectangles sitting in living rooms today. Back then when you popped in a video tape it would always pop up a small warning explaining that the original format of the film, the one cropped to fit onto a movie screen, had been changed to fit onto your home TV. As formats changed and as our TVs morphed into widescreens and movies went further and further into their original formats.
Times are changing though and the presence of physical media has dwindled as the ability to stream movies has become much more prominent. With this new technology you would assume it to be much simpler to take the original format of a movie and stream it out. Yet Netflix, the reigning kind of movie streaming, isn't taking the original movie formats. They are cropping films down and in some ways doing so for no real reason what so ever. In fact in some cases it fundamentally changes scenes, erasing characters from scenes or cropping them off to the point or uselessness.
You can see a run down of the cropping issues (properly explained) as well as some stark examples further down the story here. Netflix has responded to the matter claiming they don't crop anything but do sometimes stream the wrong version of the film. Seems like an easy out but if I was running a streaming service dedicated to movies I would strive to have the original versions and nothing less. Maybe this is piling onto the "Netflix is bad" movement but it doesn't seem to be going well for them.