640x480 is tiny compared to a modern phone...
Resolution will only get you so far; people don't have infinitely acute eyesight and infinitely precise dexterity. Most people can't reliably hit a touch target of less than ~10mm in any dimension, which equates to ~180 real pixels on an iPhone X.
People hold phones much closer than you would sit from an Olden Days CRT, too. It's not just raw area that matters, but something like degrees, as observed by your eye.
So that is not what I argue above. In my post above I argue against the dumbification of desktop apps and websites. Things that were working until UX designers came up with the idea that people are to dumb.
Edit: for those questioning my reply, I’m talking about the logical resolution (what you actually use for layout) not the physical pixel resolution