Tech gurus like Mossberg and Oprah declare the iPad their favourite thing of 2010.
Om Malik has both.
He tends to read on the iPad, write and work on the Air.
Unlike most other reviewers, he prefers the 13 inch over the 11 inch MacBook Air, the size I got. The main advantage of the bigger machine is longer battery life.
The 2.13 GHz, 256 GB Storage, 4GB RAM, 13-inch screen version of the MacBook Air is my gadget of the year. …
GigaOm review
In that same article he explains why none of the current smart phones are good enough … yet.
I’m loving my MacBook Air. I don’t have a single reservation after a couple of months non-stop use.
Apple MacBook Air MC505LL/A 11.6-Inch Laptop
You can get one for about $1000. Plus accessories.
Rick McCharles 
I want both too. It’s my birthday and I accept your offer of both machines!
I’ll ask Steve to send you both to compare. Check the mailbox several times a day as he’ll likely be delivering those personally.