Tiniest Computer Chip in the World?

The chip on the person's finger in the picture shown above seems pretty small right? And squishing everything that makes up a computer on that tiny chip seems pretty impressive right? Well, that is actually made up of "64 motherboards, each of which holds two of this tiny computer". I don't know about you, but I was mind-blown by that. Below is a picture of the actual computer on a pile of salt.

Can you even see the computer?

Although this isn't a reality yet, IBM is saying that they would create this 1mm x 1mm computer within the next five year. Apparently, they cost less than 10 cents to make as well! The obvious advantage of a tiny chip is that electronics would be build smaller while performing the same (or even better).