If you're seriously curious, I can tell you this much:
Every nerd I know with a Mac uses Linux for playing around, and a Mac as a stable, reliable computing platform for getting work done. Especially interfacing with Linux servers while still having cross-platform Windows apps like MS Office and Photoshop.
I've never heard "ooh, shiny!" play into it except with iphones and ipads - and even for those, it's more about a functional UI than about flashy graphics.
Most nerds have gone the same route with gaming too. Despite also being Microsoft, the 360 is a very popular locked-down alternative to Windows PC gaming. I'd argue the failures of Microsoft Windows is the driving force behind sales of both Apple computers and Xbox360 consoles.
Most people already have a Windows computer that can technically do everything either of those do, but people are still willing to pay hundreds of dollars to have a second machine that can do it less painfully.