"Improved graphics" refers to enhancements in the visual quality of images or designs that make them look better, more detailed, and realistic compared to previous versions or standards. Full definition
I really like the story but don't think I can go through all three games on PS4 even with improved graphics just to arrive at the «ending». (n4g.com)
Small touches like expanded notifications (again, because of the larger screen), and improved graphics performance in the core 3D UI elements go a long way to making this not suck. (gizmodo.com)
Furthermore, it boasts an improved 3D viewing angle, and a powerful CPU which allows for improved graphics and faster download speeds. (bytesizeimpressions.com)