HD Camera/Resolution Question

[delux247]

Ok, so I apologize if this has already been answered, but I'm at work on some anicent computer that freezes up when I try to use the search function.

Basically, I'm wondering what the deal is with cameras and their resolution. I've seen posts asking about the quality of older movies and responses that state that it just has to be remastered, because when a movie is filmed, even with the older cameras, it's above HD resolution already. However, if that's true, then how come everyone makes a big deal whenever a show is filmed with "HD cameras" (i.e. Planet Earth documentary). Thanks for any insights, this forum has been nothing but incredibly helpful so far.