Iain Bogost has a good piece up on Gamasutra on why we need more dull games to flesh out the medium:
In fact, the birthday party and airplane safety videos would both be impossible without the long history of film as a medium of documentation and expression that preceded them. But the banality of these later examples also increases the total attention we pay as a culture to moving images in the first place. We see films all around us, in many different contexts, and this makes film in general more comprehensible as a medium.
Very few video games set out to tackle mundane applications akin to the home movie or the airplane safety video. And really, is it very surprising? Who would set their sights on these mundane aspects of human experience, things that recede into the background, given the glitzy alternative of commercial games?