I get usable 12,800 Color and 25,600 B&W's out of my MK3. How much more ISO performance could one really need?!
That kind of performance in a APS-C sensor would be groundbreaking.
Because every new month/year, is a month/year closer to new Canon sensor technology. And they have been lagging behind Sony sensors for quite some years now. So maybe they are almost ready to strike back...
no sign of new sensor line, and it is impossible to make a APS area who are 2,3-2,5 times better than a 24x36mm sensor area with todays silicon solution, back light solution has not the same inpact as it have on a small 1,4 micron cell