I also bought an iPad at its release and about 6 months ago got a MBA 11". The MBA is superior in every way in my opinion. The iPad is just getting more and more annoying to me. It crashes probably 3 times every time I sit down to use safari. I'm scared to hit links, since it will probably crash, it will crash just reading an article!! Single tasking made it pretty much useless. Hulu blocking most content I watch was extremely frustrating. Productivity is pretty awful and the onscreen keyboard is a bear!
Don't get me wrong I LOVED my iPad when it first came out. I used it every day for hours and hours. But "updates" to the OS has made it so unstable that it is no longer enjoyable to use.
I bought a MBA as simply an iPad replacement. I wanted a portable that ran a real OS and could do more than one thing at a time (since I am an avid multitasker!)
It has met and exceeded my expectations 1000 fold! I have actually done work on this thing, I take it with me everywhere. I take it into meetings and screenings, no problem. It is FAST, very stable, and again, the most portable laptop I have ever owned....and to top it off, after installing Windows on it, it became a very adept gaming portable!! Lets see an iPad run Skyrim!!
I still use my iPad occasionally. But since I only charge it once a month its obviously not too often. I use my iPhone as my ultraportable computer. Can a MBA replace a desktop and laptop and iPad.....depends on your usage! If you need to be able to play all the most recent games at ultra settings at 60 FPS....no, not a chance. Like I said, it makes a great portable gaming device...but that's because I don't expect a lot from it, so when I get medium graphics at 25-30fps I am super happy...because its the same size as an iPad!! But for desktop gaming, no.
If you only plan on using Mac OS and use it for productivity, web surfing, email, movies and Music.....without a doubt yes! Get a monitor, keyboard and mouse and you now have everything in a tiny package!!
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Yesterday was a great reason I use my ipad instead of my air. I took a trip from florida to NYC and back for a meeting. So yesterday I started out with the ipad making presentations all day in areas where I could not be plugged in, then at 530 pm to Laguardia where the whole airport was delayed 5 hours due to weather. All the power stations were full and I surfed the web for 5 hours, no problem. All on 3G, their Boingo wifi was overloaded, laptop people pissed...I then got on the plane and watched a movie on the pad I had rented. Got home after 9 hours use with 27% left.
I could not have done that at all with an MBA...In fact, it was interesting to watch all the people at the airport with ipads reading and surfing away, while the laptop people walked up and down the terminal with their power cords in their hands, frantically searching for a power connection.
I use both. Today I did all all my recap reports on the air which would have been tedious on the ipad. I have no idea why people keep making this an "us vs them" thing, they are different, per my siganture...
Travel is an excellent example of where the iPad is very handy.