That survey of historians I mentioned is discussed here: http://www.jstor.org/stable/4519496
(it turns out it also surveyed western fiction writers and magazine editors and publishers). It was conducted in 1992.
In your earlier post you implied that the films and television you named weren't Westerns because of their geographic setting. In other words, they weren't Westerns because they didn't take place in the "West." This assumes that the "West" can be easily and rigidly defined. The '92 study shows that even the experts are unable of consensus on such a definition.
Now you are claiming -- I think -- that genre is entirely linked to story, suggesting that The Jetsons
be excluded from science fiction because it is modeled after family sitcoms. That seems to contradict your original point, no?