Apple has teamed up with LG to build 4K and 5K displays to replace its Thunderbolt displays. In this video, we unbox and provide our first impressions of the 21.5" LG UltraFine 4K display. For $524 until the end of the year, the UltraFine 4K display features a 4096-by-2304 resolution, built-in speakers and four Thunderbolt 3 (USB-C) ports. Do you think this display is worth it?