Having a jumbotron is not innovative at all since everyone else has one. I am personally opposed to a jumbotron because it directs people's attention away from the field. Instead of watching the actual players run plays, you watch instead on the jumbotron.
It also detracts from the the ND band, which is a quintessential element of the ND gameday experience. The piped in music already does this. A jumbotron would be even worse.
I have been to a lot of CFB stadiums, and to my observation, when a school has a jumbotron, it seems that the powers that be think it must be in constant use. So in addition to ads, which I think are inevitable, they are used for cheerleading, stupid contests, i.e., which helmet is the football under, etc., etc., etc.