The early 3D Video slot was something of a failure. They flopped rather like 3D TV. Maybe it was because of those hideous glasses you had to wear.
The Development of 3D Video Slot
Microgaming invested heavily in developing 3D technology for use on video slots. They launched their ” Sterling Silver” 3D slot machine for use in land based casinos. The first 3D video game used the same technology used in the TV industry. The downside of that was that you had to wear 3D glasses to enjoy the full benefit of the machine.