No, nothing burns in, you don't have to be afraid, the monitors all have several protective functions that prevent burning in. Yes, the panel is 4K UHD. There is the Pixel Shift function, then there is a Pixel Refresh cycle every 500 hours, so never disconnect the device completely from the power, automatic brightness control and also an Image Cleaning Mode has LG built in there, if a static image would be left there for a longer time.