Yes. I fully believe Apple is 100% capable of shipping 0 useful applications. They did it with the iPhone. The killer feature was it being a Phone and an iPod, so music and a bigger screen than ever before for mobile video watching. It took 3rd parties to bring the serious uses. First with web-apps, and then when the OS was opened to native applications. The history of iPhone OS and iOS is littered with 3rd parties paving the way, and then Apple cutting their legs off with their own 1st party versions.
If the first "useful" app isn't an app for making more AR/VR apps, that will be a problem. How's
https://developer.apple.com/augmented-reality/tools/ going for Apple? Especially Reality Composer.