4K,
or 3840×2160, is about 2 million pixels and it contains almost
four times the number of pixels on a screen compared with
1080P (current) technology.
8K
resolution is 7680×4320 pixels. It is 16 times more dense than
4K. The numbers show 4K at 2 million pixels is compared to 8K
at 33 million pixels. Today’s TV technology is not yet capable
of handling this kind of raw power.
For
human eyes to actually differentiate between 4K and 8K
resolutions, 8K televisions need to be at least 70 and 80
inches in size and you need to sit very close. To truly enjoy
8K, the television sets need to be even larger than that.
Panasonic has developed a plasma television that is 145
inches.
2020
Olympics will all be broadcast in 8K - Samsung, LG, Sony, and
Panasonic have all announced plans to have 8K TVs ready for
the 2020 Tokyo Olympics.
Incidentally,
as of September 2017 an 85 inch 8K TV costs $133,000 and is
only available in Japan. Oh, and the old wives tale of sitting
too close can hurt your eyes is a myth.