Both your examples are of technologies that were emergent during the times you reference, and as such are not useful for comparison. They are red herrings. We could look, for example, at food prices. Or fuel prices. Or housing.
You should know that real wages have fallen since 1980. Food, housing, fuel -- these are all more expensive relative to wages today than they were in 1980. You try to explain it away by comparing some consumer goods, but that doesn't prove your point.
The divide of riches in terms of money may be growing slightly, but the divide between low wealth and high wealth certainly is not, it's very much shrinking.
That's laughable. High wealth has skyrocketed. Sure, low-wealth individuals now encompass most of the middle class (because the middle class doesn't accumulate wealth anymore), but working-age people with $2 million in assets live a far different lifestyle than those with no assets.