It seems like that page is part of an argument from some other subject on a page that we did not get to read.
The Turing completeness disproof is actually related to recurring debates on Slashdot over the definition of phrases like "personal computer" and "general-purpose computer". I say something is a "personal computer" when the person who owns it determines what computing is done on it, and it's not "general-purpose" if specific identifiable purposes are forbidden. This includes a device running Android because of "Unknown sources" and adb install, but not a device running iOS without paying the recurring fee for the developer program. It includes a PC running Windows, OS X, or common GNU/Linux distributions, but not a major video game console.