Short-throw video projectors can operate with a minimum recoil that generally does not exceed a few tens of centimeters, or even less. Samsung The Premiere LSP7T is an ultra-short-throw 4K Laser projector.
It requires only 30 cm of recoil to project an image 100 inches diagonally. The Hisense PX1-PRO allows it to project a 100-inch image from a recoil of about 30 cm. It streams content in Full HD 1080p and has a built-in sound system of 6 Watts RMS.