In addition to being enveloped by sound and vision, HoloLens will also offer gesture control, which could be used to summon replay footage, and access stats and other content such as weather conditions within the stadium. Oh, and presumably we'll all be forced to tolerate irritating embedded advertising messages that call out our names, like in the movie "Minority Report" featuring Tom Cruise.
Perhaps my least favourite part of this video is when virtual avatars of Russell Wilson and Marshawn Lynch enter the living room by bursting through a virtual wall. As a 49ers fan, however, if I was there to experience that game via HoloLens, I would have relished the opportunity to push them both off the field, and out of my virtual living room. As you can probably tell, I'm not a fan of the Seahawks!