I bought an 11" Air because I wanted a laptop that was as close to an iPad as possible. I also have a 1st gen iPad - typing is an issue; coding's impossible but emails are OK (stick it in landscape and use the 1st gen Apple case and it's reasonable).
The Air is great but the real problem is when you are moving around. The iPad is perfectly natural to carry with you and to be used standing up - the Air, because of its laptop form factor just isn't.
The Air is great but the real problem is when you are moving around. The iPad is perfectly natural to carry with you and to be used standing up - the Air, because of its laptop form factor just isn't.