Lots of things! Keep in mind most of these apply to AR too:
- Omni-Display — We already know from component rumors that the image quality will be better than most displays and will support passthrough for AR. So this device could subplant all other displays you have, even your phone/watch! I bet Apple is planning to make it easy to share this display with others, and/or cast to traditional displays. Yes the battery isn't infinite, none are and we get by.
- Environment Filters — Most video calling platforms let you blur your background, or replace it. You could do that in 3D! Don't tell me you don't want to work on the edge of a cliff to get that adrenaline pumping, complete with suspense music! For some people, visual distraction is a big problem, so this'll be great for them.
- Visual Mood Control — Not really that different from wearing headphones/music to 'get in the zone'. Whole new class of mood control; not necessarily distracting, I trust artists will find that balance.
- Visual Therapy — Blue light therapy to help wake up and night shift mode to help wind down; perfect for those long dark winters. Start the day right with a quick walk on the moon or a gladiator match; I'm not judging!
- Always Sunny — Too bright? Not bright enough? Won't matter; headset can relight your environment, perfect for driving in the dark which a heck of a lot of people do.
- Arts & Crafts — Yeah digital is not the same, but sometimes you're just trying to express an idea and you wish you could cobble it together out of thin air. Now you can! Viva MS Paint!
Bottom line is, we'll have complete control over our visual experience for the first time. It'll take a while for all of the creative use cases to be discovered. It'll be similar to how headphones gave us control over our audio experiences.
Just because it's not 'real' or 'live' doesn't invalidate it, most entertainment is not real/live/physical and we enjoy it just fine.
OMNI DISPLAY!!! OMGOSHHHH.....you mean I have to wear the device everywhere I go if I want it to SUPPLANT ALL OTHER DISPLAYS?
Environmental Filters: I don't even use the filters in Zoom, why should I spend $1500+ for a VR headset that will do that? I also don't FaceTime, so, even less need.
Visual Mood Control: I listen to music on a surround sound system in my den or patio or on my HomePod mini Stereo pair in my garage. I have friends around to hang out with and chat, so I don't need to be rude and put on a headset by myself.
Visual Therapy: I can turn my TV brightness down with a remote and play sounds of an ocean on YouTube. Save $1500+.
Always Sunny: You're assuming that state governments will allow you to wear this when driving, despite Google Glass already being banned in vehicles by multiple states when it launched.
Arts and Crafts: I have an Apple Pencil and an iPad. How do I draw with my eyes?
Seriously, you're INVENTING uses for it rather than a use case already existing.
iPhone combined a portable music player, a cell phone, calendar, notepad, rolodex, and web browser. There were already analogue versions of all of its use cases. Later, we added Taxi Hailing, Delivery Coordination, Shopping, various other PREEXISTING use cases.
Apple Watch....is a watch.....those have existed before Apple made one.
iPad is just a larger iPhone and does all of the basic things, adding better use cases for book, magazine, etc reading.
An Apple Car is a sophisticated car, you can already buy a BMW or a Volkswagen or a Tesla. Apple didn't invent the car.
HomePod is a speaker, those were invented over a century ago.
Why would I want a tiny screen right in my face when I could have a large one everyone can enjoy? I am not an introvert, I have people over all the time.
Also, you brought up sleep aid....I can't sleep with a small lightweight facemask, how am I gonna handle a helmet?
Give me something it can do better than the iPhone other than an extension of an experience and I will not label it "Optional Accessory", because that's what it sounds like.
Apple Watch is also an optional accessory, you need the iPhone for it to work. But an Apple Watch does some things better than an iPhone (Notifications, Quick Glance, etc).