A recent study revealed that people can't distinguish between real and AI-generated restaurant reviews. Yale professor Balazs Kovacs used GPT-4 to mimic Yelp reviews, and test subjects often believed the AI-written ones were genuine. This phenomenon, known as AI hyperrealism, shows AI's ability to convincingly imitate human writing. The study raises concerns about the trustworthiness of online reviews, which significantly impact consumer decisions. As AI continues to improve, detecting fake reviews will become increasingly challenging, potentially undermining trust in online content.