With soothing music in the background and images of swirling storms and iridescent solar flares, NASA's new 30-minute video of the sun filmed in 4K, Ultra HD video is an absorbing look at the ...

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Why you should buy this: The XPS 13 Plus is a killer laptop in every way and looks fantastic with a 4K panel. Who's it for: Anyone but gamers. What we thought of the Dell XPS 13 Plus: The XPS 13 Plus ...

The difference between 1080p, 1440p, and 4K monitors lies primarily in the number of pixels and the refresh rate. While 1440p monitors have more than 1.5 times as many pixels as their 1080p ...