One cool feature is that the TV can become smaller yet still play video. Here it is descended partway, exactly enough to show ultra-widescreen 21:9 movies without those pesky black letterbox bars above and below.
Meanwhile Chinese TV brand Hisense has a short-throw 4K projector of its own. Its design is a lot more generic than the Sony's, and it costs a third as much at $10,000. The so-called laser TV has built-in speakers and a wireless subwoofer.
Unlike Sony, which doesn't include a screen, the Hisense projector comes with a 100-inch screen by Screen Innovations. It's designed to reject ambient light from above so the projected light can be seen in a bright room.
The BFGD is designed to hook up to gaming PCs, like this high-end HP Omen X, via DisplayPort. It also has standard HDMI for other gear, but it's version 2.0b, not 2.1 (which, to be fair, isn't found on any new TVs at CES). There's no antenna connection, however, because it's actually a monitor.