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by pornel 5058 days ago
Meaning of "1x" has changed from 72dpi to 100-130dpi over time.

It's not unreasonable to assume that same will happen with "2x" as screen densities gradually improve, and over time it will shift from 220dpi to 300dpi-400dpi (for desktop viewing distances).

Density doesn't need to improve indefinitely, it just needs to cross the "retina" threshold (which arguably 2x does already).