[This is not here for you, it's here for me as a record that I said this, and I was either very right or very wrong, but at least I said something - and put words down to clarify my thinking]
I feel like the 'how many times do we have to tell you old man' character - hearing that the iPhone and the Watch sucked coming out and both eventually became successful.
The iPhone did not suck in any way shape or form. It was everything anyone who touched a PDA or Blackberry before that wanted - text messages in a gorgeous swipe-able full view context, visual voicemail, a phone that had contacts as a first class citizen, you could actually read the screen and not feel claustrophobic, and a frickin' full web browser! And it was your iPod too!? Dude... we all need to sit back, stop playing revisionist history, and realize how in awe we were waiting for this stupid phone to activate - it took me over a week to activate my iPhone because we all overloaded Cingular. But the swipe gesture just to unlock it, and it's beautiful screen just had me staring at the thing for the full week - so damn excited. Simple things like the highlight 'Swipe to unlock' was a designers wet dream for a few years - come on man! This was flippin' insane.
The same thing happened to me with mp3 players and the iPod. I won't bore you with a similar story - but come on! We all bought mp3 players, the experience sucked but the end goal was worth it - and when the iPod made the thing we wanted to do easy - it was a natural success. The same thing happened with Desktop Publishers and people who used spreadsheets on a daily basis for the GUI based computers.
To spell this out again, the world already had and used on a daily basis the product class Apple made great. Most people did not care for fitness trackers/watchers when they came out [see Pebble's fall from grace, fitbit's early IPO failure, etc.], nor do most care for VR and AR headsets.
Here's the kicker, I've bought almost every generation VR and AR headset trying to make these devices compelling - but every experiment just shows these 'take over a human field of view' sucks. They do nothing for us like the music player or PDA did - maybe it's an Alto issue (we need the GUI break through for these) - but I've worked on this problem from every angle for 7 years and it sucks. Even the dang architects and mechanical engineers think it sucks - and they are in the spatial computing context! I was there with the DK1 met with HTC in Taiwan and other people I can't say, and did all the BS - this tech strata sucks for what it wants to achieve. It just needs to be a beautiful hands free reader accessory - that's where it's compelling - this whole ambient computing will not be head worn, it just won't.