NetworkManager and ConnMan (Dan Williams' Blog)

NM definitely improved a lot with 0.7 version and actually became really
useful. The human interface could still be improved a lot to avoid surprises
("I created a wireless network; now how do I disable it?", "I'm connected to
two networks via two ethernet devices, how do I disconnect one?", "Ouch,
there is a connection editor and I actually need it to do this?"), and not
supporting less usual scenarios such as multiple VPN connections is not an
advantage either.

I like the idea that ConnMan is strengthening competition
here and is actually going to help NM improve.