No, he is talking about the chart in the first post. According to it you would be able to tell the difference between 1080p and 2160p on a 50" screen from around 22 feet.
Again, I think this chart is a little overzealous because it is using an eyesight figure that only a couple people in the world have. I do like the idea of a chart using better than 20/20 vision though as many people have vision better than 20/20 myself included.
I think it would be very interesting if he could put together different charts for varying eyesight. I believe this chart equates to about 20/6 vision measured on the Snellen scale. What about making charts for others like 20/8, 20/10, 20/12, 20/16, 20/24, 20/30 etc. Then people can actually look at a chart based on their visual acuity and get more accurate results.