Samsung's Air View: Physically hover over the touchscreen (2013)
samsung.com
samsung.com
Air View is finicky on occasion, but when you are used to it, it's surprisingly intuitive and practical! It wasn't super popular though, and I imagine it could be annoying to users who didn't want it. It appears Samsung only did it for a few models, the S4, Note 3, and S5.
Air View was also coupled with other features (Air Gesture[1]) involving moving your hand over your phone to do things like scrolling or waking the screen.
That phone was pretty interesting, sensor-wise. I kind of miss using it, and I wonder if it would be practical nowadays.
[1] Air Gesture: https://www.samsung.com/hk_en/support/mobile-devices/what-is...