HI Ian,
One comparison that you could make is that the CX sensor is twice the area of the 5MP 2/3" sensor in the E-10, my old Coolpix 5000 and a bunch of others. The pixels stay the same.
One of the jabs the smaller sensors take is a lack of DOF control, or put another way "no longer able to isolate a subject using focus". This suggests that something should be said about the alternative ways to isolate a subject and maybe the art of finding and using "story telling backgrounds" ....

Bob