Recent trials of AI-powered smart shopping carts equipped with digital screens are transforming supermarket layouts and consumer spending habits, according to new research from Bayes Business School at City St George’s, University of London. The study analyzed 12,418 shopping sessions over a single month at a major German retail chain and found that shoppers utilizing the technology spend up to one-third more than traditional customers and remain in-store longer. The carts enable digital list management, personalized product recommendations, in-store navigation, and checkout-free payments, features currently being piloted by UK retailers such as Waitrose and Morrisons, alongside Tesco’s digital aisle guidance. Data analysis revealed distinct engagement thresholds that directly impact retail performance. When shoppers interacted with the cart interface between fifteen and twenty times per session, basket values and purchase sizes peaked. However, sessions exceeding twenty interactions, categorized as superuser activity, demonstrated a shift toward hedonic browsing. While these customers purchased more individual items and lingered longer, overall expenditure plateaued, suggesting that excessive screen engagement can distract from financial objectives and ultimately diminish retailer revenue. Lead author Dr. Sabrina Gottschalk emphasized that effective digital integration serves as a powerful revenue driver, offering retailers expanded advertising real estate and dynamic promotion capabilities. The research identified noticeable spending spikes during afternoon and weekend hours, prompting strategic recommendations for temporal merchandising. Retailers are advised to position premium products and new arrivals during peak leisure shopping windows while reserving targeted discount campaigns for evening traffic. Co-author Dr. Yusuf Oc noted that incentivizing technology adoption through loyalty rewards could further amplify footfall and conversion rates, though he cautioned consumers to remain mindful of how algorithmic prompts subtly influence purchasing behavior. To mitigate the revenue drop associated with interface fatigue, the researchers recommend incorporating limited-time offers and experiential deals to maintain sustained transaction momentum. As European grocery chains continue scaling automated checkout and digital assistance systems, this study underscores the importance of balancing technological immersion with commercial efficiency. Retailers that calibrate screen interactions to optimize rather than overwhelm the consumer journey will likely secure a competitive advantage in the increasingly digitized retail landscape.