While my experience with cmake is limited, I utterly loathe it. It is poorly documented and buggy. It typically takes me far more time to hammer a cmake-controlled project into a shape in which it will actually build something than it does to perform the build itself.

Ask me again once it matures - say, in three to five years - and I might feel differently.

Qmake certainly has it's limitations - and is also not well documented - but at least it generally works.