Is 8k for home cinema absolutely pointless?

[rubberduck]

As title, based on screen size, viewing distance and the fact that non-imax cinema footage is effectively 4k... What would ever be the point of 8k in a home environment? Isn't 35mm film effectively around 4k anyway?

Jump from SD to 1080p was massive, from 1080p to 4k provides an improvement with certain screen sizes but is heavily in to diminishing returns for most. 4k to 8k probably only a benefit on commercial cinema screens and certainly not in a home cinema environment?

 

[rubberduck]

Its's been increasing over the last few years. Blackmagic even launched a 12k canera for about £10k. The majority of productions will be 8k+ within the next couple of years.

So assuming we can keep adding more pixels via resolution increases... 480, 720, 1080, 4K, 8K.... And assuming the size of a home cinema screen doesn't increase much beyond 200 inches... When do we hit a brick wall in terms of increased resolution yielding no increase in visual fidelity?