To project stereoscopic 3-D images, a TV or monitor needs to have a refresh rate of at least 120 Hz

To project stereoscopic 3-D images, a TV or monitor needs to have a refresh rate of at least 120 Hz, notes Jon Peddie president of Jon Peddie Research. While new televisions typically can do that, few older ones can, he said. So most consumers will need to buy a new TV or computer monitor to watch 3-D programming, and many may be reluctant to go through the upgrade cycle in the near future after recently replacing their old analog TVs with digital ones. “That’ll be a barrier,” Peddie acknowledges.