Ppi is pixels per inch so I’d guess the measurements are in football fields or busses or whatever it is the Americans use at the moment to avoid the metric system
Yeah, all of these values are going to depend on a low ISO. You can have 60+ MP but if you're shooting at 3200 ISO it's gonna look shit blown up, less than say 30MP but still your not going to get these numbers.
This chart is very difficult to read for those with color deficiency - about 8% of men. Good and Fair are nearly the same, as well as Better and Superb. It would have been really easy to just use 5 shades of gray, or 5 colors that are distinguishable in greyscale.
I do wish smart phone manufacturers were competing to increase the MPs in the cameras because I'd love to be able to get some large prints out of the photos I take. But they just wouldn't look as sharp as I'd want them.
And no, I'm not buying a dedicated camera to carry around because I'm not an actual photographer, just a parent taking a bunch of photos of his kids.
Cell phone MP can be fake anyway, I have a 48MP one but the fine print is the extra MP are interpolated based on the neighbours so it is basically shitty MP that is algorithmically cleaned up for higher resolution.