Found this article and thought it was interesting that it had to do with a bit of Bono's fabulous grandstanding.
Bono performs at Vancouver’s GM Place during the Vertigo tour. U2 3D was shot at nine concerts during the tour, mostly in South America (Buenos Aires, Mexico City, So Paulo and Santiago) in early 2006, with additional footage shot in Melbourne, Australia. The film is now playing at IMAX Canada Place.
Shot on the South American leg of U2’s Vertigo tour, U2 3D is being billed as the first-ever live action 3D digital, multi-camera, real-time production.
Artificial intelligence that aligns "eye position" of a stereoscopic camera, high-res 3D systems with zoom lenses, robotic control and integrated digital processing combine to make Bono bigger and, for nonbelievers, more annoying than ever.
When he reaches his hand out as he sings "Wipe the tears from your eyes" during Sunday Bloody Sunday, it seems like he’s going to grab your 3D glasses. And when he fully emotes, which is most of the time, you can count the beads of sweat while trying to figure out the height of his platform shoes.
Yet, for fans, U2 3D should not be missed. Call the singer what you want — a preening opportunist, a political meddler, a Vanity Fair editor — but he understands what makes for a great performance and the power of the grand gesture. He’s one of rock’s most intense, theatrical frontmen, and this fact is brought home time and again as the cameras take the viewer from the concert arena floor to stage. While drummer Larry Mullen Jr. keeps the ship on course and the Edge inconspicuously reels off million-dollar riffs, Bono sells each and every note to the cheap seats as he prowls, poses and parades along centre stage and two catwalks extending into the audience. Besides the singer, only bassist Adam Clayton, who vies with Meg White as the Luckiest Person in Rock — because, let’s face it, a million other musicians could do what he does, with the possible exception of putting up with Bono for 30 years — indulges in any grandstanding.
Though the film does have some cool visual effects, including a shower of falling letters (as in the alphabet) and a digital ghost — Bono, for the most part the National Geographic production lets the band, the music and the audience do the work.
What finally makes U2 3D a better-than-average concert film isn’t the magnificent sound and stunning visauals but the interaction between the musicians and its fans. Rather than detracting from the performances, the shots of the ecstatic crowd, whether from the stage or from within the audience, demonstrate just how much these songs, and by extension the group, have come to mean to people.
Sure, the argument can be made that message-oriented numbers like Sunday Bloody Sunday, Bullet the Blue Sky and Pride (in the Name of Love) are simplistic, but try not to feel a chill when you realize the decades-old indictments of violence and war don’t seem dated at all.
I had the, uhm, privilege of seeing, just a few days before the U2 3D screening, a U2 tribute band at the Commodore. The Toronto-based Elevation played competent versions of the hits and a few obscurities, cribbed stage banter from live U2 albums and even (ill-advisedly) dressed like their heroes. It was fun in a cheesy sort of way but left me hungry for something more. U2 3D satisfied that craving — heck, it might even be better than the real thing.
at our flapping bird man.. 
