There is a screen inside these glasses and nobody can see it but you.
They weigh 35 grams, no more than a normal pair.
Displayed are live translations, directions and notes in your line of sight.
And they're made by the only smart glasses company that refuses to put cameras on your face.
There's a classic problem in robotics called the kidnapped robot problem.
Pick a robot up, carry it somewhere else, put it down, and see whether it can work out where it ended up.
@mehul covered all five cameras on @maticrobots and tried it out.