Remember Buckyballs, those molecules of carbon shaped like a geodesic dome? You might have read about them in the 1980s. Yep, they're called nanotechnology now. No robot surgeons, no restoring the environment...in fact, some are worried that geodesic-inspired carbon molecules are themselves a health and environmental hazard. If you liked asbestos, you'll love carbon fiber nanotubes in your lungs.
And since carbon fiber nanotubes might prove useful in making fuel cells--which are supposed to eventually replace the batteries in your cell phone and notebook PC, etc, promising dozens of hours of use before recharging--suddenly nanotech will enable cell phones to rely on portable fuel cells (which themselves look like another bubble ready to burst, or at least explode...if you like carrying around live hand grenades, you'll love keeping a fuel cell in your pocket).
And since some companies are improving their lithium-ion batteries and calling +those+ fuel cells...and obviously, since batteries are made of molecules, and molecules are nano-sized, voila! Next year, expect batteries that are 10% better than this years', and expect them to be hailed as a nanotechnology breakthrough. Any molecules in car paint? Dental fillings? Don't thank me, thank nanotech.
Borges tells a story (originally by Kierkegaard?) of certain Danish clergymen who preach that a trek to the arctic will revive their parishoners' spiritual well-being. Later, realizing that not everyone is capable of travelling in the arctic, they announce that some other cold weather expedition will suffice. And eventually, they decree that any journey--a Sunday ride in a horse-and-buggy, perhaps--qualifies as the spiritual equivalent to travelling in the arctic.
If you don't get the point of that little homily...I have a hot tip on a nanotech investment for you.