I recently upgraded from the Pico 4 to the Pico 4 Ultra, and I finally understand some of the hype around passthrough (thanks to the stereo cameras).
I’m still convinced it’s not the best solution overall—the cameras require quite a lot of ambient light to work well and the image still looks fairly pixelated—but it’s definitely good enough to feel immersive.
For the price point, I’d say its worth it!