For the unvarnished truth about when resolution is good enough, look at what Apple calls Retina. 4K at 21-inch, 5k at 27-inches, 6k at 32-inches. The resolution

For the unvarnished truth about when resolution is good enough, look at what Apple calls Retina. 4K at 21-inch, 5k at 27-inches, 6k at 32-inches. The resolution for all those displays is good enough to stop individual pixel perception. That's the best idea of what's good enough.