John I think the way the image is processed in the camera may be better than the u4/3rd cameras. I have read the same rumors about the aa filter. The AF system is also suppose to be better. I have read many complaints about the C-AF of the E3. Plus I have always felt the IS worked better on the 4/3rd mounts. The IS on my EP-1 doesn't seem to be as good as my E3.
I am sure we all are going to be surprised with the improvements over the E3. It is just going to take a few reviews and the E5 getting in a few hands.
Keep up the good work John. Reviews is my only source of info. There is nowhere to get a hands on look in my area.