You’re missing the big picture.
Doug Lance

You see too far away in the future. You can’t put a tooltip in a place so that every people can see it in the exact place you put it. Nowadays the ARKit/ARCore apps have independent sessions. This means that if you put a virtual object in a lamp, next time you launch the app it is not there anymore. HoloLens has memory of places, but this memory is tailored to YOUR device.

Have a read to this interesting post. When the AR Cloud will be real, what you’re saying will become true.

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