They can’t yet display Princess Leia’s message to Obi Wan but it looks like it’s just a matter of resolution, not principle: These Lasers Can Create 3D Signs in Mid-Air – Popular Mechanics
They can’t yet display Princess Leia’s message to Obi Wan but it looks like it’s just a matter of resolution, not principle: These Lasers Can Create 3D Signs in Mid-Air – Popular Mechanics