Background: Though curved display products such as curved monitors, TVs, and smartphones are available, it seems still inconclusive whether or not curved display is ergonomically advantageous over flat display, and if so in terms of what ergonomic aspects. To examine a visual display comprehensively, three aspects, productivity, safety, and well-being, should be considered. Objective: We aimed to determine whether or not display curvature is ergonomically recommendable, especially for monitors and TVs. Methods: Overall, we examined the effect of display curvature on visual task performance, visual fatigue, and/or watching experience by conducting three different studies. In Study 1, we examined the effect of display curvature (400R, 600R, 1200R, and flat) on visual task performance and visual fatigue. A visual search task was performed on 50" multi-monitors. In Study 2, we examined the effect of display curvature (600R, 1140R, 2000R, 4000R, and flat) on visual task performance, visual fatigue, and display satisfaction. A proofreading task was performed on 27" monitors. In Study 3, we examined the effect of display curvature (2300R, 4000R, 6000R, and flat) on presence and display satisfaction. A TV watching task was done on 55" TVs. Results: First, curved displays increased productivity. The mean visual search accuracy and speed were both higher at the 50" 600R and 1200R multi-monitor settings, and the mean proofreading speed was the fastest at the 27" 600R curved monitor setting. Second, curved displays increased safety. The mean visual fatigue was lower at the 50" 600R and 1200R multi-monitor settings. However, the effect of display curvature on visual fatigue was not significant in the case of the 27" monitors. Third, curved displays improved well-being. Compared to the 55" flat TV, the mean spatial presence and engagement did not significantly decrease up to a more lateral viewing position especially when the display curvature was similar to the viewing distance. The effect of display curvature on display satisfaction was, however, not significant in Studies 2 and 3. Applications: The findings of three studies suggest that display curvature, if its level is carefully selected, can improve monitors and TVs in terms of productivity, safety, and/or well-being.