Quicktime 5 vs. Everybody?

Dean Siren asks: "Now that Apple has released the Quicktime 5 Public Preview, they've upgraded their video codec to Sorenson 3 from Sorenson 2 which Jeremy Neish says pales in comparison to MPEG4 and its derivatives. So, how well does Sorenson 3 compete against MPEG4 as far as quality per bitrate, processor demand, compression times, and streaming are concerned? Can Apple now stay ahead of DivX, Windows Media Player 7 and Real Player 8?" Neish notes that none of the latest codecs are not compatible with Unix so only Mac and Windows users get to take advantage of the latest in digital video formats. When someone gets around to fixing this, then I can again get excited about Quicktime, until then it's just another format to me (and yet another reason why I have to have a Windows box lying around).