right, good catch. So its only useful for out-of-box jpeg with no post, works only for lenses that the mfg is motivated to include, can't be updated without a firmware flash, and the feature has the potential to damage the final result. I suspect this is a marketing job to convince buyers that it is good, but as a practical matter it would only benefit those who use the DSLR as a point-and-shoot and are more likely to stick with the kit lens -- and in these situations the user is less likely to even know or detect the benefit and hard pressed to know if it is working well or not!
I do tend to disagree here. I would love my current body to have in-camera CA correction. Why you ask? I don't want to do anything in post but try to get it right when opening the shutter. I'm only a beginner, but I try to learn, and I tend to think that it may be harder but is more rewarding, even though I know that a little bit of post could do wonders.