One of the first groups to adopt the PDF format (way back in version 1 of Adobe Acrobat) was the publishing industry. It provided an exact copy of what was to be printed complete with all the fonts required by the image/page. Prior to this you had to worry if the printing establishment had the same software and release level, had the same font, and had the same default settings for their software and opsys. Add to this the variations in the way fonts were rendered in those days (most software would substitute the built in fonts for what was called for in the documents) and it was rare that the finished product looked anything like the original.
As NatCh said, PDF is a great format when used for its intended purpose.