I can only imagine the next step is actually posting fans tweets next!
Anyone remember when G4 (I think) got the rights to air the original Star Trek? As I recall they aired a version of the show that had people's messages about the show/episode popping up in "real-time" on the side of the screen. The video itself was presented in a smaller window. I don't have cable anymore so I don't know if they still do this or if they even have the airing rights to TOS.
I fully expect the WWE to implement something like this with Tweets and the like scrolling by at some point.