Tim Cook’s statement: “The more you look at a tablet as a PC, the more the baggage from the past affects the product” could be interpreted many ways (or in just one way for that matter) including as a shot at their long-time rival up in Redmond (and all of the ‘baggage’ that he sees them carrying over into the post-PC era).
(Source) The Seattle Times: http://goo.gl/EGMHC