When is a monitor with a screen measuring 18.4 inches diagonally valued at just under US$15,000? According to Canon, it's when it is the first professional reference display from its brand to feature this size at a 4K/UHD resolution. The DP-V1830 can also support a 4-way split-screen, enhanced blacks and improved viewing angles.
https://www.notebookcheck.net/Canon-announces-its-first-gen-18-4-inch-4K-HDR-professional-reference-display.583125.0.html