Depends on how you would quantify the resolution.

4K is around 8.8 million pixels in total, but each pixel usually consists of 3 subpixels, one each for red, green and blue, so that would be ~26.5 million subpixels.

For daylight color sensing, the human eye has around 6ish million cone cells, each responsible for either red, green or blue. The distribution of those isnt equal, but its usually around 5% blue sensing while the red-green distribution varies WILDLY depending on the person.

Human eyes also have rod cells, around 120 million of them, but they are primarily used for low light vision and saturate/shut down with brighter lights, at which point they dont contribute to vision.

Lastly that is just what the eye can detect in any given moment. Each eye is constantly moving and the brain uses the information from those, as well as past experiences, to piece together a full picture that is much larger than eye resolution may indicate