Which scientific innovation was widely adopted by retailers in 2015-2017 but saw an 80% abandonment rate by 2019 due to privacy concerns and inaccurate biometric measurements?

In the intersection of science and retail, technological innovations sometimes fail to meet market expectations despite significant investment and promising research. This poll explores one of the most notable scientific retail failures of the past decade, where cutting-edge technology couldn't overcome consumer hesitation and practical implementation challenges. Test your knowledge about what went wrong when science met shopping!

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AR-based smart mirrors with body composition analysis
AI shopping assistants with facial recognition
RFID-enabled automatic checkout systems
Molecular scanning devices for product authenticity