NewChloe18 was on the other day, so since she is pretty much the only one doing 4K, I figured I'd show the differences in quality using just her stream, for reference. Remember, these aren't full screen shots, they're the default window with the chat still there, and I'm only on a 1080p monitor, so you won't see the full true 4K resolution. But this can give you an idea of both the difference in resolution at the lowest ends vs. the highest ends, and the actual diminishing returns going to 4K gives-- the differences from 720p and up tend to be small to most people.
This helps the comparison, because it's the same model, the same background, etc. But at the size of the window, anything from 576p and up tends to look just a bit sharper each time. To see the true difference, you would need to be in her room, go full screen on a 4K monitor, and be close enough to really be able to see the 4K difference (which varies based on the size of the screen). The best place to look in these shots is the wood to her right (from our perspective) in the screenshots, and see how much more detail is there in each shot; the same for the carpet behind her. Also the bed and curtains to her left (from our perspective) gives an idea of the better visual quality at each resolution.
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