Well, if you look back at the history of Apple, most of their popular products were considered unnecessary, especially including the iPhone. Of the Mac, iPod, iPhone, iPad, AirPods and Apple Watch, I don't think any of them were immediate hits except (ironically) for the iPad.

The thing about Apple is that they iterate in meaningful ways over a long period of time. I'm unlikely to buy this first version of Apple Vision Pro. But in a few years, I expect some later version of it is likely to be as indispensable to me as my noise cancelling headphones.