'Hancock' - Hollywood's First Big 4K Release?

It seems to me like 'Hancock,' from Sony Pictures, is the first big-time digital cinema release in 4K. Sony Electronics, of course, currently sells the only commercial 4K digital projectors, which are installed in about 200 theaters in the US, according to The Hollywood Reporter. I suspect 'Hancock' isn't playing on all 200...

Sony has done other stuff to promote their 4K projectors in the past, but as far as I know, this is the first release of a big studio picture... though Sony did a special showing of 'Spider-Man 2' back in 2004 with the projector.