Ever since the first 3D films hit theaters in the 1950s, viewers have been forced to wear some kind of glasses in order to experience three-dimensional effects. However, in the past year or so, we've started seeing a number of glasses-free solutions hit the market.
In 2011, Toshiba released the Qosmio F755 notebook, which uses its webcam to track your eye movements and serve up really compelling 3D images, though these are only optimized for a single viewer. Last year, phone vendors HTC and LG both launched handsets with glasses-free, stereoscopic 3D screens that weren't home theater quality, but were good enough for some three-dimensional fun. By the time my son is 10, large-screened devices like TVs will be able to offer a compelling glasses-free 3D experience to many viewers at the same time.
Read more: Will 3D Smartphones Fall Flat?