looker: And by "mirrorless", you mean point and shoot? I'm scanning through pages and pages here on DP, trying to find out what the difference between "mirrorless" and point and shoot is. Apparently, just a psychological marketing distinction based on a premium price.
It is not a psychological distinction. A critical physical difference is sensor size. The sensors in point & shoot cameras are much smaller than those in mirrorless cameras, which are in turn smaller than those in DSLRs. Sensor size is linked to pixel size which in turn is linked to image quality.