Look at this picture:
Identify the irony?
Ok, so some contextual konwledge is needed. Clue: that notebook hooked up to the projector in the background is an Apple MacBook Pro.
Still don't get it?
Last clue: that man is part of a group of bloggers presenting Microsoft Vista and Office 2007 at the Microsoft HQ in Diegem, Belgium.
It can't be more obvious than this. You know what I'm trying to say.