New Delhi, Feb. 9 -- In the fast-moving world of technology, innovation is often met with excitement, investment, and grand promises. But not everything that starts with a bang ends with a boom-some gadgets and technologies fizzle out despite their initial hype. Let's take a look at some of the most ambitious tech products that ultimately failed and why they couldn't stick around.

What it promised: A futuristic, hands-free augmented reality (AR) experience with voice commands and a built-in camera. It was supposed to revolutionize the way we interact with digital content.

Why it flopped:

Privacy concerns: A camera mounted on your face was a little too dystopian for most people.

High price: At $1,500, it was more of an expensive experi...