@Moonshine,
I only use the four lenses I mentioned, and all are primes. The 20/1.7 comes the closest to pancake in form, and it's an excellent lens.
I shot pro video for years; really, the vast majority of edited documentaries and feature films shoot static setups (single shots from a still camera position) and the separate shots are edited together to produce the intimacy of changing perspectives. I can understand why zooms are so handy for home/casual use, but unless they are used very carefully, the viewer's experience can be unsettled by the movement. In pro use, apart from the very expensive (and hence occasional) use of a crane, or a rig on tracks, primes on cameras locked off on tripods (or panned via a fluid head on a tripod) are the norm.
for both stills and video, if you have shaky hands, the OM-D will definitely be the better choice for you, IMO.
@GaryAyala: I do see what you see at higher ISOs, and agree that if this is your preferred working zone, ISO-wise (1600+) then the OM0D is the better choice.