I think Game of Thrones is ushering in a era where television is the preferred means of telling epic stories. I won't be surprised if we start seeing studios spending large budgets on television shows. I mean, you'd think the dragons would look worse blown up on the big screen, but the CGI is just as good as any movie.
When people stop going to the movies and stay home for their entertainment, shows like GOT will be the norm; epic shows with huge budgets that skip the theater experience entirely. Good or bad, it looks like we are heading that way. Going to the movies is just too expensive and you have to deal with potentially obnoxious people. I think that's part of why people like GOT so much, it's like watching a movie without all the bullshit that comes with going to a theater.