How is it that HD (High Definition) is sharper then the human eye?

As in like movies and all that.

flight777
August 6, 2010 at 6:44 am

HD format at best is only 1920×1080 pixels or a little over 2 megapixels. Depending on the distance from you, your eye is able to resolve much higher resolution than that. It is difficult to pin down an exact number as there are several variables involved, but some say in the hundreds of megapixels. When it comes to consumer electronics, don’t believe everything you hear
lare
August 6, 2010 at 6:44 am

Huh?
Get close enough to the TV display and you will clearly see pixel structure.
As for movies, they have about 4 times the definition of HDTV, but again, take a pair of binoculars to the theater and you will see that close up, the picture is blurry. (blur is the analog equivalent to digital pixels).
In either case, if you are sufficiently distant from the display, the picture looks life-like in definition. same is true for an analog TV set even. Go even more distant, then you could say the display has a greater resolution than the eye, so what does that mean?
The limiting resolution of the eye is about 40 arc-seconds, and not a measurement that converts to "pixels" unless you also specify a viewing distance.