for the super affluent,
https://www.kaleidescape.com/compare/
Also the whole "you can hear more with lossless audio" is just straight up a lie.
The “best” quality of streaming you have is Sony Core https://en.wikipedia.org/wiki/Sony_Pictures_Core but it has a rather limited library.
Pricing, if I am reading the site correctly: $7k-ish for a server (+$ for local disks, one assumes), $2-5k per client. So you download the movie locally to your server and play it on clients scattered throughout your mansion/property.
Not out of the world for people who drop 10s of thousands on home theater.
I wonder if that's what the Elysium types use in their NZ bunkers.
No true self-respecting, self-described techie (Scotsman) would use it instead of building their own of course.