That is true, there are some moving that way. What about the hundreds of other stadiums that are not upgrading anytime soon, though? Again, seems like a big issue they have not addressed or mentioned.
It'll be another 3 years before things are really ironed out in the newer buildings. Not sure how older ones will manage to deal with the situation.
Cisco is helping improve the situation as well although it is expensive as was noted earlier. http://www.cisco.com/web/strategy/sports/stadium_wifi.html