When Mercado Libre, Latin America's largest e-commerce platform, installed a series of AI-powered billboards across Buenos Aires, it turned a static medium into something reactive. Working with creative agency GUT Buenos Aires and several tech partners, the company's 'Custom Billboards' use computer vision to read their surroundings in real time, picking up on traffic patterns, visual cues from passers-by like sportswear or business attire, even someone walking a dog. The system matches what it detects to a product from Mercado Libre's catalog and displays it alongside a scannable QR code. All processing happens on the billboard itself, and when conditions don't meet a confidence threshold, the billboard falls back on broader signals, such as weather or time of day. The goal is contextual relevance.…