According to the announcers, some Surface tablets weren't allowing the Patriots to pull up plays. The Microsoft rep on the field said all fine once they began using hardwired tablets.

This wasn't mentioned in the article. I am watching the game.

I can confirm this. I don't know why they aren't mentioning the entirety of the broadcast in the article. My favorite is that Simms and Nantz had to think really, really hard about the name of the tablet and just gave up half way through their report by just saying "Microsoft Tablets" instead of the Surface or Surface Tablet.

So in other words, crappy wifi?