When one is dancing with a tiger, one does not want to stumble:

Today, Sony officially conceded defeat to the recent flurry of rumors and speculation, with Japanese newspaper Nihon Keizai Shimbun reporting the machine has been pushed back until November.

There aren't many details out right now, but Sony says issues over the finalization of copy protection technology related to their Blu-ray disc drive is the cause of the delay.

True, Microsoft survives these sorts of things routinely, but they don't have to worry about competing with Microsoft.