While the divide is growing, things are getting more and more affordable and even the poorest in developed countries today live better lives than kings two centuries ago.
10 years ago even the president of the united states couldn't have gotten their hands on a device equivalent to todays smartphones. Today even the billionaires can't buy a better device than what the middle class has.
in my opinion you shouldn't guage quality of life by how advanced the devices we have are. i dont feel like having a high-tech smartphone provides me much happiness, it's just a necessity for participating in modern society.