I was recently waiting for an Uber when the GPS decided to lie for sport. The car was somewhere nearby, I was somewhere nearby, and somehow both of us were trapped in that modern ritual of wrong pins, slow turns, vague waving, and “I’m here” messages that help absolutely no one. That was when I had a very reasonable thought: this is exactly where a hologram of a giant arrow pointing at me would be useful. Not “spatial computing.” Not a $3,499 headset. Not an AR demo that looks incredible only if you’re the person wearing the glasses. I mean an actual, visible, shared holographic arrow hovering above my head like a beacon for one mildly annoyed passenger. Lucasfilm Ltd. Sci-fi spent decades training me to expect spectacle. Consumer tech, being consumer tech, looked at that dream and asked whether it could be turned into a screen, an app, a subscription, or a device with a charging case. Sci-fi did get plenty right The annoying thing is that sci-fi wasn’t exactly wrong.…