HDI makes high-end projectors and this $55,000, 300-inch 3D projector is one of their products. The projectors come in multiple styles and types (these are just renders) and each model number, the 120, 200 and 300, is related to the maximum screen size these puppies can project. At 55 bones these things had better give you an MRI as well.
The projectors have two full-res imagers so there is no 3D flicker between images. That means you’re seeing two 1920×1080 images instead of an image of potentially reduced quality coming from one imager.