It is said of LSD "You might see things that aren't there, but you won't NOT see things that are there."

The three terms have discrete meanings and are not buzzwords. 3D simply implies any technology that tricks the eyes into seeing a two dimensional surface as having depth. Virtual reality means replacing the real environment with a virtual one; A headset that blocks out the real world. Augmented reality is essentially an overlay.

These earbuds are well within the realm of augmented reality. And the overall ideas were all sound. It's a product that can in principle enhance conversations for the hard of hearing, protect ears from loud noises without reducing the quality of the sound (useful for anyone who still goes to the movies), add ambient sound to a boring room while still being able to hear people, or even listen to informative tracks at a museum. But...they were, what, three hundred bucks, fugly looking, and even their hyped battery life was a dang joke.

Making cars is expensive. Making high tech cars is more expensive.

Tesla isn't magic. Look at the sales numbers the big three have and how often they turn out new programs (that aren't really an entirely new product). The math is pretty simple. Tesla doesn't make enough money in their product line and is turning out a new program when the old ones aren't paying for themselves.

It's a stock market thing, really. Look at the stock prices of the automakers. They continue to make successful products but their stock price doesn't increase. Yet a company like Apple hasn't put out a really innovative product in years, is getting destroyed by Samsung..... but continues to be a stock market darling.

Welcome to the irrational world.