GoT is the perfect show for the modern, high-definition massive screen home theater. And it's entertaining! I'm re-watching the series from the beginning and now that I know who the main characters are and what happens to them, I'm catching so many little details that I missed the first time. It's just as enjoyable the second time around.
GoT has raised the bar as to the quality of the programming that viewers now expect to be delivered to their home theaters. In doing so, it set the standard of the medium.
You can look back on old made-for-TV programs that were meant to be epic or historical, and they just look like...regular TV. I remember a version of The Odyssey that was done by NBC back in the late 90's. It had a pretty big budget, but it just looked like a made for TV movie. Even Shogun looks like regular TV fare. It had to do with the lenses they used, and the composition for smaller TVs, I guess. But GOT looks and sounds like a big budget movie screen spectacular.