- "Pre-chimping" (this term belongs to Kirk :) ). This means being able to see how the camera's settings and electronics will treat an image BEFORE you shoot it. Not possible with an OVF, it can be achieved with live view on an SLR, but not with the camera to your eye.
- Focus Peaking - I am not familiar with what Kirk describes, about the camera highlighting items that are in focus in your image. I'm thinking Lumix cameras don't do this? Please comment if you can shed any light on this subject.
- The ability to quickly check an exposure in the EVF after it's taken, without having to take the camera away from your eye.