Sit close to a 2K projector image and the picture begins to break apart into individual pixels, as illustrated here. 4K is practically immune. (Screen image simulated.)
Will I see the Sony 4K difference?
The closer you sit to a 2K digital projection images, the more the illusion of a complete image begins to fall apart. You can see the individual pixels that make up the picture. Diagonal lines, in particular, break into noticeable stair steps and "jaggies." Sony 4K projection enables viewers to sit closer to the screen and be completely immersed in an apparently seamless and continuous, incredibly detailed picture.