Pixel Watch 5 prototype reportedly found underwater near St. Martin

Someone found what appears to be a Pixel Watch 5 underwater, and the caseback tells the whole story: SpO2, skin temperature, EDA, UWB, and a pressure sensor, every one of which already exists on the Pixel Watch 4. Google is apparently iterating on a watch without adding a single new thing it can measure. Whether the design or software improves is still unknown, but on hardware, the Pixel Watch 5 looks like a Pixel Watch 4 that went for a swim.