Today, Apple released its Vision Pro headset, the company’s first major new product launch in a decade. WSJ’s Joanna Stern on whether the augmented-reality headset has the potential to take a niche device for nerds into the mainstream.  Suggested Reading: -Apple Releases Vision Pro Headset, First Major New Product in a Decade  -Apple Is Breaking Its Own Rules With a New Headset  Suggested Watching: -Will the Apple Headset Blow Up?  Learn more about your ad choices. Visit megaphone.fm/adchoices