all these giant stadiums are going to have a tough time competing with the home experience. awesome tvs, dvrs to watch stuff again, more flexibility in camera angles, not wasting your whole day. NFL teams are spending a billion dollars on incredibly expensive things that just give people what they have at home (a 9000 foot tv 9000 feet away or a tablet on your lap, same thing, except ones a lot more expensive. wifi, stuff like that)
stadiums might have to eventually downsize to be filled with old time diehards. i'm glad they had the sense to make the dome a realistic size. they could shrink capacity too if they wanted too.
on campus and intimate, that's the way it's supposed to be
no one has fun at a concert in a venue too big. you're too self conscious. you feel like you're part of a giant failure. when it's the right size, people have more fun, easier to get people to show up. same with sports