When it comes to making things, smaller is usually better. Think of cell phones or heart defibrillators.
Smaller things are simply more useful and cheaper, usually.
But gazing into the next century, smallness is broaching a frontier that makes the tiniest dimensions used in today's factories seem like football fields or rows of Greyhound buses. Viewed broadly, nanotechnology is mankind's effort to measure and fiddle with things at this minuscule level, and one obvious place to begin using such capabilities is computers. The smallest memory devices today are still designed and built at dimensions far above the nano-level, and some experts warn that this technology is nearing its limits. Nanotechnology might be the path. You'd be surprised.