OH MA GOD! Anti dust? I'm so for anti-dust.
I'm really so sick of seeing little dust dots in my nice blue sky. And I don't even change lens often. Little differences in image quality are not so important to me, when the sometimes glaring dust dots can be much more obvious. Good to see Canon stepping it up. BTW I'm currently using Nikon, and I developed a major batch of photos, to see *gasp* my beautiful blue sky with beautiful black dots. And now everytime I look at these photos, those are what catches my eyes first.
Well, yea, post-processing? Recently I spotted more than 4 dots every image, who knows how many more each time. Cleaning? Maybe sometime in the future. And those swabs aren't cheap.