there were tons of smartphones on the market prior to the iphone. i used several of them. mostly windows mobile devices that required a stylus or keypad for input. they had apps stores, web browsers, email, etc. copy and paste, which the iphone lacked at release. from a functionality stance there were many options very much like the iphone available. the interface on the iphone was nicer for most things, and it had a nicer web browser. not a different world of functionality at all, just a bit nicer overall but also with some big trade offs.
That doesn’t fit: Apple’s been experimenting with VR since the 90s and Vision Pro was hardly novel–well executed, but not novel. I think it’s more complex where you have to think about the products executives and Wall Street analysts want to exist providing pressure against the “is it good enough to buy?” response.