The most beloved version number by marketing people the world 'round. Version 2.0 suggests to the consumer that this version of the product is indeed twice as good as the original. History has shown that 2.0 will be shortly followed up by a 2.1 release; which at the request of the marketing team will be followed up by a 3.0 release to further increase the excitement of the asses of the masses. Please see: vicious cycle.