Both the iPad and iPad mini were specifically mention in the prohibited items list, although other tablets that are larger than 150mm x 100mm, too, would fall under a similar rule. Will there be exceptions? Perhaps, since the media might find this particular ruling to be rather stifling in nature.
This is not the first time that a sporting franchise has banned the iPad from their home games, as the New York Yankees also did the same in 2010, as the Yankees cited that security concerns provided adequate reasons for such a ban to be in place, although said ban has since been knocked out of the park after a couple of years.
You can still use your smartphone to capture selfies and other future memorable goals, too, as Louis van Gaal and team marches through the tunnel later this season.