...and do you really need the pixelcount? Doubling the Pixelamount just gives you minor resolutiondifference in x/y, but you gain a lot of negative effects. That's the reason why I still use the 5DC... it's a lightgathering beast with 12 MP on a FF-Sensor.
And yes, the new Canon 24 IS or 28 IS are not that big, but they have a whopping Price around 700$. For a normal 2.8 prime... I think this is way too much. Without IS ist would be 200$ less, I think.
Why does everyone think IS is *the* masterkey to filmmaking? Every serious filmmaker uses manual lenses and If you want to have steady shots you can even get a gyrostabilizer for the whole camerasystem.
Don't get me wrong, If canon would make both versions, everyone would be lucky... but this won't happen, so everyone has to pay the higher price for the demands of a few.