I needed a placeholder for what goes there.
HUD, helmet mounted AR, headset AR all are out now.
TL8 AR will be built in to contact lenses, provided by neuralink (the electrodes in your brain use the sensory input nerves leading to your brain to overlay the AR) that sort of thing.
TL9 holographic is a bit of a placeholder too since it is likely to be a bit more like an immersive VR that takes over your senses entirely, you actually feel like you are in the virtual world...