And why does Xbox's known and announced 720 not have a Wiki, but PS4 does already, and has for about a week or so now?
I realize Wiki needs sources, but even if I develop my own console, if there's no source, I get no article.
Xbox does not have one because Microsoft have not officially released any information. Sony had a 2 hour event that showed the PS4's specs, games etc.
If you cannot provide proof then you don't deserve an article. Otherwise everyone would just fill wikipedia up with crap.