I didn't know what Project Harmony even was and that article doesn't clear it up in the first few paragraphs. For anyone else fuzzy as well, it looks to be "a standardized set of contributor agreements (to the linux kernel)"[1]
Actually, the kernel is one place where you'll not see Harmony's work at all; these agreements are meant to be applied to a lot of other projects. Canonical is pushing for them, but is not alone in that effort.