I had a phone that took 3D pictures with a true stereoscopic camera and had a 3D display all the way back in 2011, an LG Optimus 3D. It was really neat, but 100% a gimmick because you could only share them with other people who also had the same phone or a 3D TV/monitor, and photos took up 2x as much space. You could still obviously share/view them in 2D, but it kind of defeated the point.
The one really neat feature was that it could “convert” games into 3D, which worked pretty well and was a pretty cool effect overall.