Among its many virtues gadget-wise, 2009 has seen 3D technology go from irritating to well, not quite so irritating. Of course, with so many companies working to develop a satisfactory way to bring the third dimension to our TVs and computers, it's only a matter of time before we find a device that accomplishes the goal without giving us a headache. And now 3M, who's been really digging their heels into display technology as of late, is debuting a 3D panel that eschews the glasses for something called conoscopy: the surface of the devices features a film with lenses on one side and prism structures on
