4K resolution
So while 4K UHD sounds like it has a pixel structures with 1/4 the area of 1080p, that does not happen with pixel shifting. Only a true 4K projector offers that level of resolution. That's why "true" 4K projectors cost so much more than 4K UHD projectors with otherwise similar feature sets. They produce smaller pixels, finer resolution, no compromising of detail or color from overlapping pixels. By comparison, the slight difference in aspect ratio between DCI and 3840×2160 pixel displays without overlap is insignificant relative to the amount of detail.
MPEG-H 3D Audio
On June 24, 2016, the South Korean standardization organization "Telecommunications Technology Association" TTA published the standard for "Transmission and Reception of Terrestrial UHD TV Broadcasting Service" for the South Korean terrestrial UHD TV broadcasting service to be launched in February 2017. The TTA standard is based on ATSC 3.0 and specifies MPEG-H 3D Audio as the sole audio codec for the 4K TV system.