You can currently run Hotz' software Openpilot on your car and many do. The general consensus is that it's as good as Tesla's AP2. There are hours of footage of Openpilot driving by actual users (not PR videos) on Youtube.
It most certainly does "come close to even an alpha version of a commercial product".
It's one thing to have a few tech-savvy enthusiasts installing your system and using it a bit with a good understanding of its strengths and weaknesses. It's another thing entirely to let tens of thousands of random members of the general public use your system for months on end with minimal-to-no training and no technical insight into it.
But I was just making the point that it's definitely at least Alpha software.
https://www.youtube.com/watch?v=GzrHNI6eCHo https://www.youtube.com/watch?v=XYUHrI5-A9A https://www.youtube.com/watch?v=UkS-iJ5auD4
So, he could have gotten the same results with a webcam.
My understanding is that these depth cameras create a 3d point cloud and use the rgb to map/overlay color onto the 3d.