Real scifi can work well in film/TV, but it's quite rare for it to get made properly, so I think it's as much circumstance as it is inherent. But it's much easier for something with meaning and substance to stay true when it's not bastardized by a group of people, and I definitely associate the hard scifi genre with print.
Most of the stuff in their list I don't think of as space opera, although space opera to me is such a vague definition that I can't really categorically dispute them. I guess when I hear space opera, I just think of Star Wars and that's it. Anything else, I'd categorize more by more typical scifi/fantasy labels etc, but I guess they're not mutually exclusive labels.