It's possible that up to 20% of people won't be able to watch 3D programming on their TV due to a lazy eye muscle, color-blindness, headaches, or motion sickness.

Related Fact: Analysts expect about 1.6 million 3D-ready TV sets will be shipped in North America by the end of 2010.

[Sources: Wall Street Journal/The Hollywood Reporter. See previous Numbers of the Day here. ]