A "hand-manipulated hologram" sounds like the really cool movie scene from Iron Man where we know there's a green screen and Robert Downey Jr. is just fiddling with the air.
"We figured out how to design rocket parts just w[sic] hand movements through the air (seriously). Now need a high frame rate holograph generator."
Now Musk has the world drooling over this holographic tech so it's lucky for us that he'll be posting a demo video this week.
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Wouldn't it be neat if you could read our blips with a hand-manipulated hologram?!