It's funny reading this... I've gone the other way and said my goodbye to Windows... except for at work
I was in the Microsoft store this week and noticed the new Dell XPS 13 with the edge to edge screen. It looks nice, has the new Broadwell CPU, but... it's running Windows 8.1 which I hate.
As a PC technician who has only worked with PC's (primarily) for the last 20 years, I'd be the first to slam Mac's in the past, but now I'll be the first to say how great they are to work on. That's no to say they too don't have their faults, both camps do, but Microsoft... I don't know what they were thinking with the Metro interface. It's crap. 150% crap. Software companies are suppose to make our lives easier, not more frustrating and confusing. Every time I have to help someone with their Windows 8 PC I just want to slam my head against a wall repeatedly. With Windows 7, at least you know what's open etc... it's easy to navigate... with 8,

it's extremely frustrating to use just trying to navigate around, see what's open, and get back to your open application.
On a quick note, I have been using the Windows 10 Beta at work, and it's a much, much needed improvement over 8.1. But still, they need to axe the Metro interface.
Back on topic, I went the other way because of how nice OS X is to use. Also, when you compare OS X to Windows 8... it's so much more of a cleaner interface. Sure OS X isn't immune to problems, as with any OS, but the overall experience using OS X a lot better, which is why that Dell may have looked good, had newer specs, but it was still running 8. A turd in a skirt
And I'm not really bias because I've always been a big PC gamer (and PC Technician) but I can't stand the direction MS is going with Windows.
Also, in regards to the hardware since people always bash Apple, if you really break things down, you get far better parts and build quality with Apple. My T430 at work cost well over 1K and didn't come with a backlit keyboard, the thing is all plastic, no aluminum, and doesn't have a glass trackpad. As well, a point that most probably don't notice... The $899 Air gives you the Intel 5000 Graphics. Find me a PC Laptop around $1000 with the Intel 5000. I haven't found one. It's all 4200/4400/4600, with half the performance. Apple always gives you the full fledge Intel graphics even with their lowest offerings.
That Dell XPS 13", it uses the Intel 5500. When Apple releases their refresh, if Rumours are true it'll have the Intel 6000. Now why couldn't Dell use that? PC manufactures are always charging more, and giving you less. They skimp in area's they think people won't notice.
Anyways, my 2 cents. Sorry for the long post.