^ Definitely.
Also, the Real 3D was before Avatar, and created by Cameron.
Think I found out why:
"The projector alternately projects right-eye frames and left-eye frames 144 times per second. It circularly polarizes these frames, clockwise for the right eye and counterclockwise for the left eye. A push-pull electro-optical liquid crystal modulator called a ZScreen is placed immediately in front of the projector lens to switch polarization. The audience wears spectacles with oppositely circularly polarized lenses to ensure each eye sees only its designated frame, even if the head is tilted. In RealD Cinema, each frame is projected three times to reduce flicker, a system called triple flash. The source video is usually produced at 24 frames per second per eye (total 48 frames/s), which may result in subtle ghosting and stuttering on horizontal camera movements. A silver screen is used to maintain the light polarization upon reflection and to reduce reflection loss to counter the inherent losses by the polarization filters. The result is a 3D picture that seems to extend behind and in front of the screen itself."
- Wiki
Although: "One complaint with many 3D display systems is that some viewers may feel nauseated or experience a headache. This effect is more likely with rapid cuts between scenes with very different depth, which directors and editors of 3D movies generally try to avoid." - Wiki