Let's put this in perspective

Three months ago semiconductor manufacturers expected a drop in sales of about 30% ( http://tech-no-media.blogspot.com/2009/04/microprocessor-market-contracts.html ), so a fall in sales of PCs of only 7% doesn't look that bad to me.

Also it is to be expected that Netbooks (or rather mini laptops) will do well, since "normal" PCs are now overpowered for most peoples usage. Why pay more for power you don't need, especially in these troubled economic times.