AdvertisementSKIP ADVERTISEMENTYou have been granted access, use your keyboard to continue reading.When you write your name in the air, you can see the letters appear on your smartphone.With a tap of thumb against forefinger, you can open an app on your desktop computer when using an experimental bracelet that reads the electrical signals pulsing through your muscles when you move your fingers.Credit...Reality Labs, MetaJuly 23, 2025, 11:00 a.m. ETThe prototype looks like a giant rectangular wri...