Bert found this. Dang cool! Talk about a practical invention.
(The frame is treated, so all the colored water collects in the middle!)
Nanotechnology: the limits will not be reached anytime soon! Will be exciting to watch things which will come from it. Just for one thing, I believe that it will beat the heck out of traditional production methods one day when it comes to dramatically pushing back the limits for how strong, light-weight, and cheap we can produce things. Not to mention miniaturisation.
The Diamond Age: Or, a Young Lady's Illustrated Primer by Neal Stephenson (I still think it may be his best book) is a fabulous SF book which in the middle of all the drama explores the possibilities of advanced nanotech manufacturing. If you know of another good one, do speak up.
(Nonfiction too, by the way. I just bought "Physics of the Future", but the reviews are a little bit mixed.)