Originally Posted by FotoPete 
About the mechanical parts, the camera still needs the metering sensors and stuff right?
Nope, for EVF with live view, you only need your CCD Sensor. You can meter right from the CCD sensor with live histogram. As it makes use of all 10MP (or whatever size), full RGB channels and the whole image, it is potentially much more accurate than your typical 16 segments, 200 segments or n segments matrix metering.