Sales for Apple's mixed reality headset Vision Pro flagged. Soon, Apple may need to contend with Meta's Orion augmented reality glasses.Miguel Candela/SOPA Images/LightRocket via Getty ImagesMeta debuted its Orion augmented reality glasses last week without a consumer release date.AR glasses are a substantial step toward a future that ditches the handheld smartphone for face computers.Meanwhile, Apple has to play catch up with its own AR glasses.The battle of the face computers is here, and Meta just launched a highly compelling salvo.Last Wednesday, CEO Mark Zuckerberg unveiled the company's latest innovation, Orion — augmented reality eyewear that weighs about 3.5 ounces.