Today we looked at video and the need for compression. However, remember the important thing for videos is bitrate! Take for example the game Witcher 3. On the PC it can be displayed at 4K, on the PS4 1080p and the xBox One at 900p. The reason for this is the specification of machines and their GPUs. The PC can be upgraded which means that you can spend more money buying better components which can process faster. The consoles are limited by the spec they were designed with, this in turn means that machines with limited processing power can simply not push the number of bits required to display in 4K. However, the PS4 and xbox One claim to be 4K consoles, I guess time will tell.