Field of dreams: Ballparks unveil tech upgrades

 Professional sports teams are attempting at a furious rate to lure fans away from the comfort of their couches to live games. And sweet technological upgrades to their home venues become a bigger selling point every year.

Roughly a dozen Major League Baseball clubs followed that strategy by making tech-centric improvements to their ballparks in advance of the 2011 season, which kicks off Thursday. Notable upgrades include ballpark-wide Wi-Fi access (Chicago White Sox) and LED high-definition ribbon boards (Arizona Diamondbacks). Here's a deeper look at nine other teams that have made similar significant upgrades.