Five World Cup innovations you might have missed  Referees have
been using vanishing spray during 2014 World Cup to stop
defensive walls creeping forward at free-kicks. Photo / AP  The
excitement around this year's World Cup in Brazil has been
ratcheted up a notch now that we're in the second round of group
matches.  While there's been talk about the innovations in how
we watch and follow the World Cup on TV and social media, it's
the technology innovations happening at the game level that
viewers need to keep an eye on in Brazil.  1. Goal-line camera
technology  One big story at this year's World Cup is the new
goal-line technology that claims to be 100 percent accurate.
What that means is that goals will be called goals at this World
Cup, and we won't have to worry about controversies like we did
at the 2010 World Cup, when a ball clearly crossed the line but
was not ruled a goal.  The goal-line camera technology
(GoalControl) is better than instant replay technology in other
sports because it can detect a