There was a story a few days ago about using radar for object recognition and gesture tracking (among other things).

https://news.ycombinator.com/item?id=18855337

2019 iPhone is rumored to have new Sony depth sensing (time of flight) camera on rear, for AR and normal photos.

Google also had Project Tango, which I believe used hardware IP they acquired through their brief ownership of Motorola. They scrapped that approach since current mobile processors are powerful enough to accomplish the same thing in software.

Occipital's Structure Sensor has been available for years, and uses an active scan along the lines of what the Kinect does.

Among the available options, I'm most interested in calculating depth from parallax relative to motion using scale heuristics and dead reckoning, like Tango. Particularly for outdoor applications.