Flickr and Facebook have proved that people like sharing photos online. Now Nikon is betting that people want to show them on real-world surfaces, too. Its new Coolpix compact digital camera includes a built-in projector for displaying images on walls, tables and, if this video starring generic partying hipsters is anything to go by, curtain showers and pillows as well. But will it catch on, and will the battery hold out long enough… ?