I've got both Nikon (D800, D3) and m4/3 systems. I mostly use the m4/3 as I shoot a lot of street. My question is, what are the m4/3 sensor possibilities? They seem stuck at about 20mp, and even the new (rumored) Olympus E-M1x uber m4/3 has a 20mp sensor. I'm not a technical guy, but I understand there's a quality trade-off between pixel size and the number of pixels on a sensor; that is, for the same physical size, a sensor can have fewer but better pixels, or more but less good pixels. Is 20mp about as good as it's going to get with m4/3? On the other hand, cell phones must have tiny pixels and they still get decent results -- could some of that tech be applied to m4/3 sensors to increase quality? I'm not unhappy with my GX8s, but I worry about further investing in a system that could find itself left behind, especially when Nikon (in particular) really seems to be setting itself up for the future with small bodies, relatively compact lenses and those large diameter lens mounts.