4K resolution
As noted above, DCI 4K is 40962160, while 4K UHD is 38402160, producing a slight difference in aspect ratio rather than a significant difference in resolution. Traditional displays, such as LCD or OLED, are 3840 pixels across the screen, with each pixel being 1/3840th of the screen width. They do not overlap—if they did, they would suffer reduced detail. The diameter of each pixel is basically 1/3840th of the screen width or 1/2160th of the screen height - either gives the same size pixel. That 38402160 works out to 8.3 megapixels, the official resolution of 4K UHD (and therefore Blu-ray UHD discs).
God of War (2018 video game)
Unlike the previous games, Santa Monica did not make a demo specifically for public release. Barlog explained that doing so would have delayed the game by a couple of months. He also confirmed that the game was built for the standard PlayStation 4, but the game would "benefit from the power" of the PlayStation 4 Pro; an updated version of the PlayStation 4 that can render games in 4K and was released a few months after "God of War" was announced. Players with a PS4 Pro have two options to either favor resolution or favor performance when playing the game. Favoring resolution runs the game in 4K with checkerboard rendering at a target frame rate of 30 frames per second (fps), while the performance option runs the game at 1080p and targets 60fps. In late December 2016, Barlog confirmed that the game was playable from start to finish, and later said that the game's story would take 25–35 hours to complete, which is significantly more than the previous four main installments, which each took an average of 10 hours to complete.