When I sold my beloved MacBook Air a few weeks ago, I was taking a risk. I was betting that I would be able to replace it with the brand new iPad, a device I had never touched. In fairness, I still own both a 27” iMac and a 17” MacBook Pro. Nevertheless, the Air had served as my personal computer for over a year, and I had come to rely on it for everything from web surfing and email to word processing and podcast management. I’ve been using the iPad now for a week, and while I can’t say that it does everything that my Air did, it seems to be doing most of those things quite a bit better.