Allegedly, could of course be a mockup, and I'd be surprised if it was this quick and that this wasn't a mockup of it actually working rather than it really working... but interesting none the less.
I can see no reason why this wouldn't be possible, camera takes a number of images over a period of time, aligns the images, outlines changes from the average and offers to remove them. You can do it yourself in Photoshop easily enough if you have a bunch of shots, it just takes a bit of time and isn't quite as automated.
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