A few years ago (at least 10 years I believe), I read in a magazine about a "revolutionary" camera which was able to take pictures such that from one picture you could, afterwards, choose the point you wanted to focus on (during the post-processing).
I do not remember the name of that camera, I just recall it was in the shape of a cuboid (a rather long one) and (very vague memory) that it was black or red.
I could not find anything online but would be interested to see what it has become (and read about the technology - if it was not snake oil).