3D is nothing new!

Stereoscopes made 3D possible in the mid-nineteenth century!
Stereoscopes, also known as stereopticons or stereo viewers, were one of America’s most popular forms of entertainment in the late 1800s and early 1900s. The first patented stereoscope was invented by Sir Charles Wheatstone in 1838. Stereoscopes continued to be widespread in America until the 1930s. Then stereoscope production declined, likely due to the new interest in motion pictures.
Read more about the 3D World of Old.
Read more about stereoscopy.