As a whole, I think the NFL is a bubble. It might still be expanding 20 years from now but will eventually burst.
Somewhere, some time, paying fans will draw the line and stop paying so much to see games. Maybe when tickets reach $1500 for a upper deck corner seat for a September game, or maybe when owners dome all stadiums, remove the air and install coin-fed oxygen tanks in each seat (I bet Dan Snyder has already looked into this). You gotta think eventually people will reach their limit. Possibly? I don't know. The prices right now are already fuckin' obscene IMO, but 80,000 dumbasses per week per NFL city seem to really enjoy paying for the experience.
Never underestimate the stupidity of the American public, though.
The TV numbers alone should be kept in mind the next time an NFL owner cries poverty over player salaries, or needing a publicly funded billion $ stadium for their private profits, or what have you.
Me bitter? Nah...