It's more insane than the monitor stand. That monitor stand is for a monitor that is aimed at professionals working on HDR content. It's a very low volume, specialised part, $1k isn't entirely unreasonable.
These headphones will be mass produced in huge volumes. It's a consumer product. Just a very expensive one.
I disagree, the stand it is entirely unreasonable, it will sell, but not because of reason, its the only option for now, you're cornered having to add 1k to the 6k purchase because of it and production companies will sign off.
This headphones will sell for the reason that people don't want to/have time to research headphones, they know this will integrate well with what they have and will justify it since is also a fashion/social class statement.
They wont sell because they're headphones, they'll sell because they complete the apple wearable ecosystem.
These headphones will be mass produced in huge volumes. It's a consumer product. Just a very expensive one.