I'm already seeing the "Darwin" effect take place in the oddest of places: my in-laws.

My mother-in-law, generous woman that she is, is not exactly compuer-savvy. XP gave her fits as a user. Questions I never thought I'd hear asked ("Can you teach me how to google?") have come up.

So when they annouced they'd bought another computer, I was wondering which OS they chose - XP or Vista - and what headaches I would now have.

Turns out, they chose neither - they chose a Mac. It does everything they need it to do and it's not confusing for them.

Many users are asking themselves - if I need to change my user experience anyway, why not get a Mac?

The timing of this shift in UI may not have come at a worse time - a time when Macs are already gaining ground, many users are up for an upgrade, and the transition to Mac looks so intuitive.

It has me asking questions, too...