I got to see Lenovo's no-glasses 3D monitor at IFA. I'm not sure if I'd want to stare at it for hours on end, but the eye tracking helps a ton to make it way better than earlier attempts at lenticular 3D. https://www.pcworld.com/article/2046107/lenovos-3d-monitor-slowly-pushes-3d-displays-more-mainstream.html