Meta's new VR glasses weigh 100 grams because there's nothing computing inside them. No chip, no battery, not even a tracking coprocessor. All of it lives in a puck in your pocket, connected through a fiber optic cable. That one decision is the whole product. Apple went halfway with Vision Pro. They moved the battery to an external pack but kept the M2 and R1 chips on your face, and the headset landed at over 600 grams. Weight became the most common complaint in reviews. Meta went the rest of…