I recently purchased a new MBP and a new LG 4K external display. The monitor is 27" and I found that I needed to use scaled resolution of 2560 x 1440 to be productive. Under system report, the OS is showing the resolution as 2560 x 1440 rather than 4k. Is that the scaled resolution or the actual resolution the monitor is now running at? Since I need to be at 2560 x 1440, is there even a point in having this 4k display? Should I return it and get something cheaper? Thanks.