I seem to remember a product like this that turned out to be mostly vapour ware. It was a watch that would project onto your arm. https://www.theverge.com/cir

I seem to remember a product like this that turned out to be mostly vapour ware. It was a watch that would project onto your arm. https://www.theverge.com/circuitbreaker/2018/4/27/17289572/lumiwatch-projector-smartwatch-arm-touch-screen https://www.theverge.com/circuitbreaker/2018/4/27/17289572/l... Edit: Huh, I think this is their product actually: https://techcrunch.com/2023/09/30/humanes-ai-pin-debuts-on-the-paris-runway/ https://techcrunch.com/2023/09/30/humanes-ai-pin-debuts-on-t... So it's a pin on your chest that will project into your hand. This sounds almost identical to what the watch tried to do... except exponentially more difficult. 1. It needs to be significantly lighter weight 2. It needs to project significantly further away. 3. It needs to identify the hand only when it is "ready" to be projected on, then aim at it. This alone would present major issues I think.