Ken MacLeod is amusing on the subject of Mundane SF in his post entitled To Boldly Stay. He begins:

Like a flu pandemic, a new movement in SF has been overdue and anxiously awaited for some time. It's not yet clear whether Mundane SF is the Big One that's destined to devastate the globe, but already the scientifictional experts are on the case, shaking their heads over the chicken-coops where the virus spreads.