If ever I had doubts about the ability of the Mac platform to finally begin to erode away Microsoft's market share in the PC industry, all of them have been totally erased after today. There are a couple of reasons for this.  
 
I was sitting in my office when a new teacher to our school walked in. I asked her how she liked her iBook. I was surprised when she asked me, "Which one?" It turns out not only does she have the iBook that the school loaned to her for educational use, but she was also recently given an iBook by her parents. Not only that, but her parents gave Macs to all of their children because of the, "many problems with their PCs in the past...!"  
 
This was no ordinary moment. The light bulb suddenly went on. People in the mainstream world were finally awakening to the power and stability of Mac OS X. Not only that, but they are adopting it into their lives at an ever more accelerating pace.  
 
No doubt this is a result of the so called "Halo effect" of the iPod. The aforementioned teacher went on to confirm that she had purchased an iPod prior to her new iBook. I'm sure that there has to be a correlation between the positive experience that she had had with her iPod, and the resulting effect of the purchase of two iBooks for her home. 
 
How, you might ask, does this relate to the MacWorld Expo? Easy. During the Expo keynote, Steve Jobs announced that to date Apple has sold 42 million iPods. During this year alone, they sold 32 million! He also said that during the last quarter they were selling 100 iPods a minute! Now I ask you this:  
 
If one family that had a good experience with their iPod decided to replace all of their children's Windows-based PCs with Macintosh computers, how many Macs is Apple going to sell to the families who purchased the other 41,999,999 iPods? 
 
I think you and I both know the answer to that question. : )