The increased fidelity is particularly noticeable in cinematography and high-end video production, making it the current standard for modern home media and streaming services.
Higher pixel counts allow for larger screen sizes without losing image clarity. SSIS-287 4K
Many 4K releases utilize High Dynamic Range (HDR), which provides a wider range of colors and better contrast between the brightest whites and darkest blacks. here is a general overview:
If there is interest in the technical aspects of 4K resolution, here is a general overview: SSIS-287 4K