TJB.
"What's the biggest room in your house?..."
I'm sure smartphones have a lot to do with it. At any given time about half the crowd are gazing into their phones or taking photos as opposed to watching the match.
This is partially connected to the influence and popularity of betting apps. Lots of people who sit around me are checking their acca's every five minutes.
It's not just that, of course. Some people can't go 90 minutes without checking Facebook or Twitter. I'll admit that I sometimes have a gander, but I'm trying to wean myself off it. I've paid for a game so I should be watching it.