Another feature the NEC 3090QWXi offers is Standalone Calibration.
You just plug a colorimeter directly in the USB connector on the monitor and let the built-in software do the rest. This feature is useful when you have no regular calibration software available or if you need to cross-calibrate several monitors in the office to have them all on the same page.
Below: Standalone calibration is useful but it seems to be less accurate than proper SpectraView calibration.