I'd really like to get the MacBook Air but I don't think I would carry it around with me very often. I work in a corporate environment so I'm essentially using my company PC during the day and my laptop at home at night. I don't think I would use it much for the portability factor. I have an aging Core 2 Duo laptop with a 15" screen as my primary PC and want to replace it with the MacBook Air. Does anyone else own a MacBook Air and have it essentially sit at their desk all the time?