He probably means creative pro type work (video editing and graphics creation, high-intensity photoshop work, etc)...as opposed to things like word processing and emails, which pretty much any new computer today can do...
Ugh... I took that sig down because I didn't get the iBook right away. I decided to wait a couple of weeks due to the fact that there might be some upgrades due on the iBook and also, to get the most recent upgrades, I would have to wait a few weeks anyway, because the newest iBooks aren't even shipping towards my area yet
And that sig was also poorly done and I was tired of looking at it