Crazy-fast Hi-res Inkjet Printing
A company called Silverbrook Research has come up with a technology for doing full-page width inkjet printing (i.e. they don't use a traversing head, but a matrix of nozzles, presumably with some kind of switching mechanism) that can print 6-12 inches per second. That's one A4-sized sheet per second. They have videos of their prototype printers working. The A4 and label printer videos are particularly impressive.
This could have seriously interesting ramifications for small-scale commercial printing. This solution doesn't look to be nearly as fast or have the quality level of offset printing . . . but it looks competitive. And it doesn't require the setup that offset does. For a small publisher, this is huge -- if you are printing a card game, for example, and you are doing a small run (say 2500 units), prepress can be 20% or more of your total job cost.