I gave it serious thought and very well might have if I didn't need a laptop to take tests on.
When I finish school and (if) I have a job, I suspect I would trade my current macbook pro for an iMac+Air+iPad combo. The screen real-estate of the iMac makes it a nice machine for a lot of different tasks and the Air is good for travel.
I only use a desktop and my iPhone because I have a budget, but I honestly can't see myself ever wanting to use a computer with a tiny ass screen on a regular basis. Every time I'm forced to use a laptop for an extended period of time the small screen size makes me feel claustrophobic.
but in doing that you are not getting away from the laptop model there as the Air is still a laptop.
Also an easy way to solve the screen real-estate problem is use an external monitor with the laptop. That way you have dual monitors. Minds you Apple's dual monitor support and UI is pretty piss poor but you could at least have the bigger monitor being primary and have the laptop monitor there to store stuff in.
Not going to disagree there. I find myself doing all my computing work at my desk with my laptop and 2nd monitor. Surfing from the couch or bed I will either be on my phone or tablet now days.That's true. I wouldn't want with an Air if it wasn't for the nature of legal work. If I was looking at this strictly from a personal use point of view, I would only get an iMac and iPad because the iPad is better for couch surfing and I'd do all my full computing at my desk.
I thought about this before deciding on the iMac, and the problem was that external displays inevitably take up a lot more desk space, and don't have the same design aesthetics as a single computer. Plus, if I were to spend money on a mbp and an external monitor, I'd end up with a budget pretty close to what an iMac and Air would cost anyways.
I sold my MacBook Pro on eBay and bought two refurbished iPad 2's. One for me and one for the wife. We have a 2011 Mac Mini server used as our desktop machine for when we need a full computer. It was just becoming tedious keeping everything in sync between the MacBook and the Mac Mini because I like to have access to all the stuff regardless of which machine I'm on. It was just easier to move to iPads for portability and utilize iCloud and iTunes Match.