"A box of convenient features wrapped in dishonest 4K marketing."
The '4K decoding' with HDR10+ means this projector can understand a high-quality video signal, but it will display a simplified, downscaled version of it at its native resolution, which is very likely 1080p.
This is for the casual user who prioritizes convenience. If you want a portable, all-in-one streaming box with automatic setup for impromptu movie nights and don't obsess over pixel-perfect image quality, the feature list is strong for the price.
Anyone seeking a true 4K picture or a projector for a room with even minimal ambient light should look elsewhere. The deceptive marketing and lack of a stated brightness figure are deal-breakers for serious home cinema use.