Touted as a game-changer in wearable technology, Google Glass was a pair of smart glasses with a built-in display.
The Segway was heralded as a revolutionary personal transportation device.
In an attempt to rebrand its flagship product, Coca-Cola introduced "New Coke" in 1985. The response from consumers was overwhelmingly negative, leading to a quick reversal.
HD DVD was in direct competition with Blu-ray in the high-definition video format war.
Marketed as a 3D gaming console, the Virtual Boy was a commercial failure due to its high price, monochromatic display, and discomfort during use.
Introduced to compete with Apple's iPod, the Zune media player struggled to gain traction in a market dominated by Apple's products.
The Apple Newton was an early attempt at a personal digital assistant (PDA). While it laid the groundwork for future devices, it was not a commercial success.
Betamax was an early home video recording format that competed with VHS. Despite its superior technical quality, it ultimately lost the format war to VHS.
Hyped as a potential rival to the iPhone, the Fire Phone's high price, limited app selection, and gimmicky features led to its failure in the market.
Google Wave was intended to revolutionize online collaboration and communication. However, its complexity and the lack of clear use cases led to its discontinuation.