I'm pretty good with small area touch-ups using a tool called clone brush in the software I use, but some jobs are way too time-consuming or difficult to persevere with. This new tool would be a delight to use. The last example, where they use it to fix a stitched panorama, wow.
Reality is merely illusion, albeit a persistent one. ~ Albert Einstein To be conscious that you are ignorant is a great step to knowledge. ~ Benjamin Disraeli