This article explores the Oculus Santa Cruz VR headset, focusing on whether it used an OLED screen. It details the prototype's design, inside-out tracking, and display technology, emphasizing the advantages of OLED for VR. The piece also compares OLED with other display types, discusses future innovations, and explains how Santa Cruz paved the way for the Oculus Quest. The article concludes with a comprehensive Q&A and summary of the headset's impact on VR technology.