I suspect this is a thinly disguised editorial advertisment for Vodaphone.
I can't see that 5G (compare to 3G/4G or their internal wifi) would changed the use of food/drinks apps or even an online program at the stadium.
Would they be allowed to stream clips during the game? BT might have something to say against that .. I'm guessing they would be allowed to stream anything shown on the big screen internally through the internal WiFi inside the stadium (but whats' the point.. everyone inside the stadium can see the screen anyway).
Showing realtime clips over 5G implies through the internet but that would allow people away from the stadium to potentially view clips as the match progresses.. and I'm sure that would infringing BT tv rights.
Matchday program - I never buy one - I get all the information from the website, which is going to be more up to date than the programme anyway.
Producing it must also be a major hassle for the club as well. I wonder how many they sell and does the sales revenue actually cover the printing and manpower costs of producing it