'Life is But a Dream': Beyonce's world, seen through a mish-mash

'Life Is but a Dream," Beyonce Knowles's HBO documentary about herself, is billed as a revealing look inside the superstar's world circa 2011-12, as she shifts business gears, reinjects her music with an updated R&B feel and, as you surely know, gives birth to a daughter. The project is mostly just a fleeting glimpse, which is ultimately a disappointment, given the world's desperate and ongoing interest in all things Beyonce.