Actually, by all rights (if you read the description, they hint on this), the cave is actually MORE immersive than goggles would be.
The cave comes WITH goggles, but their only aspect is to give you depth perception via high-speed shutters in each eye that sync up with the left-eye and right-eye frames in the cave itself (which obviously alternate back and forth at very high speeds)..
So when you're in the cave with the goggles on, you see EVERYthing in perfect depth perception. Goggles simply can't do that (yet).
About the goggle research, the big problem that put the pause/break on the advent of the consumer-level goggles is the fact that the screens involved in each eye of the goggles are based on technology that works about 4 out of 5 times at best.
That means that with the best possible production facility, 20% of the funds would go into the crapper via bad "throw-away" goggles. No company in the world would invest in that.
But the research IS continuing.
