Apple has begun selling LG's UltraFine 5K Thunderbolt 3 (TB3) display on its website for US$974. The display features 5K resolution, 500-nits of brightness, integrated speakers and webcam, TB3 charging (85W), and three additional 5Gbps USB Type-C ports.
http://www.notebookcheck.net/LG-s-UltraFine-5K-display-aimed-at-MacBook-Pros-goes-on-sale.188303.0.html