Forbes:

One Apple product, something that didn’t exist five years ago, has higher sales than everything Microsoft has to offer. More than Windows, Office, Xbox, Bing, Windows Phone, and every other product that Microsoft has created since 1975. In the quarter ended March 31, 2012, iPhone had sales of $22.7 billion; Microsoft Corporation, $17.4 billion.Now when we say “worth” there’s a number of different things that we can mean.

Agreed. “Worth” may be a bit misleading but there’s no argument about the sales numbers.