Which innovative feature is NOT currently available in smart shelf technology being deployed in advanced food retailers?

The grocery industry is constantly evolving with new technologies to enhance customer experience and operational efficiency. One of the most significant retail innovations in recent years has been the implementation of smart shelf technology. These digital shelves are transforming how consumers interact with products and how retailers manage inventory and pricing. Test your knowledge about this cutting-edge retail innovation that's changing the food shopping experience!

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Real-time nutritional information display that changes based on consumer dietary preferences scanned from their shopping app
Automatic inventory tracking that alerts staff when products need restocking
Dynamic pricing that changes based on product freshness and expiration dates
Taste simulation technology allowing customers to sample flavors through the digital display