Don't disagree that new wealth is being created, what matters when talking about quality of life and inequality, is who are the beneficiaries of this new wealth? Is it the already wealthy? If so, that's part of the positive feedback loop to drive inequality further. More assets, Yay. Held by fewer and fewer people over time. Boo.
The new wealth is being created BY and FOR the already wealthy. That's literally what capitalism is! New wealth creation is certainly not driven by poor Steve who does not have money to start a new business or market his new IP.
How much of the money made by the Harry Potter Franchise went to JK rowling vs her publishers? Supposedly she got a 15% royalty rate, which is considered "High"
>There are limited amount of real assets available at any given time
This is correct.
>and wealth inequality means regular people hold less of the assets each year, making them poorer
This is not. New wealth is constantly being created. There isn't a fixed amount of pie on the table.