Takahashi states the following in the first paragraph of his article:
"Leopard, the newest version of Mac OS X which debuts in October, has features that make it more intuitive and easy to use than Microsoft's Windows Vista operating system released in January. But the question remains: Does it matter enough to get people to switch?"

Takahashi then goes on to give his opinion that the current version of Mac OS X, Tiger, is already superior to Vista.  In his view, Leopard will widen th gap:
"There is no question in my mind that the Mac OS already beats Windows Vista, and Leopard will widen the gap. It already incorporates 3-D graphics to make a better user interface. Leopard's desktop interface is easier to use. You can gain access to your downloads more easily just by looking on the "dock," the equivalent of the task bar in Windows Vista. With a feature dubbed "stacks," you can click on the folder on the dock to rapidly gain access to its contents and view them in a way that gives you an idea of what is in each file. That means you don't have to spend as much time wondering where your files or applications are hiding."

A single version of Mac OS X - $129
Takahashi describes how Apple releases a single version of Mac OS X, a stark contrast to how Microsoft sells Windows:
"Jobs noted that Leopard is simpler than Windows Vista because it's a single operating system with just one version that sells for $129. Microsoft has subdivided its operating system into cheaper or more expensive versions with different features available. Leopard can handle 64-bit applications just as easily as it can handle 32-bit applications, while Microsoft's operating system again uses different versions."

Will people switch?
Takahashi wraps up the article by asking if Leopard will encourage people to make the switch.  He questions if people will pay extra for a Mac.  He states the following:
"I think these features are great. But I don't know if they're going to make a difference to the vast majority of users. Will people pay more for Macs? Vista has some stability problems that are still being worked out. But by and large it works. It's like the difference between a Ford and a BMW. You know which one does the job better, but which one is good enough?"

You can view the article in full at the San Jose Mercury News.

Switch To A Mac Commentary
I agree with Takahashi's view that Tiger is a better operating system than Vista.  The new features in Mac OS X Leopard will likely give Apple another leg up on Microsoft but to what extent?  Macs on the other hand give users the flexibility to use multiple operating systems such as Mac OS X, Windows, and Linux.  Mac users only need a single system, the choice is obvious.