LG has announced an updated version of the 27-inch UltraFine 5K display, the monitor that Apple has approved as the best option for the current generation of MacBook Pro's, but which has not been available for several months. The new model increases the power output to 94 watts and now offers both USB-C connectivity and Thunderbolt 3. That means it works with the 2018 Pro via USB-C, although it is not clear which resolution will be supported.
Otherwise the product appears to be essentially identical to its predecessor, so our buying advice will probably remain the same. The UltraFine screens from LG have extremely good panels and excellent native support for macOS functions, even including True Tone when connected to a compatible laptop. But their industrial design is pretty boring and they are not a good option for Windows computers because they have no physical controls.
LG has also recently introduced a new 24-inch version of the UltraFine 4K, which is larger than the previous 21.5-inch monitor but has a lower resolution. It's a solid standard option, not least because the new UltraFine 5K still costs nearly twice as much at $ 1,299. Both models are now available at Apple Stores and Apple's website.