I've been using Windows PC's for the last 15 as well, having basically never touched a mac. Last month I got sick and tired of my legs frying and the weight of my latitude laptop which has otherwise served me well. I grabbed a Macbook Air, which is overpriced given the hardware, BUT, considering my purpose it filled it's role brilliantly.
The only thing I need a laptop for is mobile internet beyond what my 4.3" touchscreen cellphone can do. So my only requirements were speed internet surfing, and ULTRA light weight. Since the MBA fits all of these categories brilliantly I am a VERY satisfied customer. The MBA has been out a few years now and still nobody manages to beat it. I was looking forward to this dell laptop and the other ultra portables coming out in the future, but Apple looks like they'll continue to own that crown for years to come.
Apple computers are designed to fill very specific market segments, the kinds other developers overlook and try to encompass in a more general segment. Every laptop manufacturer is scared that if they dont include a dvd drive, or mutliple thumb drives, or video output or something else that they'll get knocked on. Apple is willing to put themselves out there and try to design something new and if it fails, they'll eat the loss. Luckily for them almost every one of their ideas has been a resounding success.
Iphone anyone? I remember coming up with that idea when the first crappy stylus based palm phones were released. I always wondered why no cell phone manufacturer had the balls to design a 100% touch screen phone. It's because they were all scared that the consumer would still want buttons of some kind and that they'd be laughed at. Apple said fuck that, designed a phone and risked a significant portion of their business in doing so. The result? Well we all know, and now every single company tries to rip off their designs.
You'd think I was an apple fanboy, even though I own Android phones and Windows PC's. But I can recognize talent when I see it, and apple has a lot of it.