From AnandTech: Today LG and Apple made a joint product announcement of sorts. Apple announced their new MacBook Pro, which uses four Thunderbolt 3 ports for IO. During the launch event, Apple also noted that LG would be launching a new pair of monitors to go along with the MacBook Pro. These new monitors are branded as LG UltraFine, and LG is advertising them as monitors designed to seamlessly integrate with macOS and both new models of the MacBook Pro.
The first LG UltraFine display is a 21.5" 4K model. Unlike most "4K" displays which really use the 3840x2160 resolution defined in the UHD spec, this is a 4096 x 2304 display that actually has over four thousand pixels on its longer axis. The 27" model is a 5K panel with a resolution of 5120 x 2880. Both monitors connect over a single cord. In the case of the 4K model it can be driven using a single DisplayPort 1.2 stream over a normal USB-C port. The 5K monitor requires two DisplayPort 1.2 streams and so it is a tiled display. However, using Thunderbolt 3 for the link avoids the dual-cable solution used on existing 5K monitors. These solutions also allow for data and power transfer, and so the monitors can actually charge a connected laptop while also providing three 5Gbps USB-C ports and stereo speakers.
The panel characteristics for both displays are similar. Both have a peak brightness of 500 nits, and they use the P3 color gamut, although it's almost certain that they retain the standard 2.2 gamma and white point of D65 from existing displays. The one key difference to note is that the 21.5" model is only an 8bit display, with support for 16.7 million colors, while the 27" model is a 10bit display supporting 1.07 billion colors. The 27" model also has a camera and a built in microphone for audio and video calls.
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