What has happened is instead technology allowed some luxury products to be commodized and available to everyone. I doubt multi-billionairs build their own OS-es, cell phone towers, hardware, batteries, support from scratch. They buy an iPhone. Someone on food stamps could concievable save money and still get an iPhone. They both have a luxury product so to speak. But this is a cool anomaly. It doesn't happen with cars, housing, job opportunities, healthcare, clothes, safety, free time, food, etc.
So I think looking what kind of tech products are avaiable to everyone doesn't work as an argument regarding inequality. What about inflation adjusted salary, isn't that a better metric to look at? Or say the cost of healthcare or housing as percentage of wages... defintely not the type of computer and printers people can get.