See this presentation screen by DVE Telepresence (auto-play alert), it allows you to move PowerPoint slide objects in the style of the film Minority Report. What do you think? I am afraid that more sophisticated screen technology will not turn humans into better story tellers.

What would be useful though is to have a technology that allows you to write on a transparent whiteboard in front of an audience where technology takes care of mirroring your writing, so it becomes readable by both you and the audience.

Secondly, having a camera hidden inside a screen is great for creating natural eye contact.

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