In CSS, “px” is not an angular measurement and it is not non-linear
This response is taking issue with the words used, rather than the underlying claim of the original article. In fact, this response contains a whole section and a diagram which are effectively supporting evidence for the original!<p>The most important thing to take away from the original is that the css unit "px" has no relationship to the actual size of a pixel on the screen, and all the physical units (inch, cm, pt) are defined in terms of the csspixel. So marking a button as "width: 1cm" will almost never render something over 1cm of the screen geometry.<p>Incidentally, this is why designers like device models with only a few geometries, such as the iPhone. They can do the math themselves to work out how many iphone-pixels are in a cm, and write their styles accordingly.