1. When's the last time that an Apple silicon device got hot? They don't get hot.
2. Almost all reviews I've seen so far indicate that there is virtually no motion sickness with Vision Pro except in extreme cases.
3. Eye strain also seems to be non-issue due to the fact that you get to specify your eye requirements beforehand. (Of course, this makes it more difficult to share the device with family members, etc).
4. I take it that neither you or I have actually tested the Vision Pro, let alone used it in our daily lives, so personally I think making declarations for how it will work or sell seem pointless.
Now, all of the above doesn't mean the Vision Pro will succeed. It may not succeed, and yet it may. Time will tell, but I'm not sure the 3DTV is the right analogy to the Vision Pro.
PS. Completely agree on the pointlessness of the Samsung "innovation" of having two people watch 2 different streams on the same TV. I struggle to think of even a niche use case where that would be genuinely useful.
I'll reply to the points rather than a wall of text:
1. My iPhone 15 gets hot all the time, on a daily basis - especially when recording video. Hot enough that I wouldn't want one strapped to my face. The Vision Pro doesn't large fans to actively cool the device, it's not going to get hot enough to burn you, but it is going to get sweaty and uncomfortable.
2. Motion sickness is dependent on the individual and is caused often (but not exclusively) by the eye strain issue. But also any kind of lag that fills your entire field of vision is going to cause problems - even a juddering video because of a slow internet connection - like people experience on streaming services and youtube a lot. There is also the weight of the device and the heat that it will inevitably generate that will make people feel sick.
3. Eye strain is inevitable for the same reason that 3D movies create it. The focus of the image is beyond the screen, but your eyes are focused on the flat plane of the screen itself. Eye muscles have to work hard to operate in a different way, and this causes strain. Using diopters, etc. doesn't solve this problem because something that appears to be 20 metres away is really only an inch from your face. The Motion Sickness is directly tied to this.
4. People buy technology all of the time they don't need or use. People bought 3DTVs and never used the 3D function. A lot of people are buying electric vehicles and are getting buyers remorse when they have to completely change their lives to revolve around charging the car - rather than having a tool that serves their lives.
The Vision Pro is giving off major 3DTV vibes. But these aren't the only limitations.
It's a computer screen. A $3500 non-portable screen for ONE person that has a maximum 2 hours of battery life. That's not even long enough to watch the latest movies on Apple TV (made by Apple) like Napoleon or Killers of the Flower Moon.
It has no input with tactile feedback on its own, the input is talking and pinching, so it's not a private device that can be used in a public setting. It still requires a keyboard and mouse or stylus to do anything artistic or productive. You can't use over-the-ear headphones, so your options are airpods (if they're supported), which are another thing that needs to be fully charged or the speakers in the device/external speakers that everyone else can hear.
People that aren't using the Vision Pro are also going to have a huge problem with cameras being pointed at them in what should be private or semi-private spaces. This was the main reason Google killed the Google Glass project, the users were even called 'Glassholes', and the Vision Pro requires the cameras to be on at all times while being used.
It's not even revolutionary in concept - Microsoft tried and failed to introduce spatial computing with the hololens a few years ago, and VR headsets have largely been a niche gaming product. Even the porn industry hasn't been able to capitalize on VR and if anyone was going to make it work, it was them.
This iteration of the Vision Pro is like Samsungs '2 streams, full screen' concept. Yea, it was technically brilliant and amazing that it worked, but it was also kind of useless and had a lot of limitations and compromises. The only Vision Pro use case that people have been able to mention on this forum is 'i can watch big-screen movies on a plane'... but only with 2 hours of battery life.
Like I said in my previous post, this iteration will be looked at as technically brilliant in design and execution, but functionally it was just kinda dumb, impractical and generally pointless.
I'd like to see the technology evolve into something useful, but i'm not going to pretend that this is version of it has acheived something great. It feels like a prototype or a concept demonstrator rather than a fully developed product that customers want or need.