For example, the holograms in Star Wars: They are made to look lower quality than the world around them, so it's visibly clear this is a digital projection (and not teleportation or a wormhole or something). But could you imagine if Apple released a holographic "FaceTime3D", only the holograms were monochromatic, filled with scanlines, visual noise and crappy audio quality? Reviewers would blast it, and a poor experience like that could even do more harm than good to the popularity of AR.