I had a 2009 13" Macbook Pro, first generation iPad, 11" Macbook Air and the 2010 13" Macbook Air. I ended up selling all of them except the new 13" Macbook Air which has become my primary and only machine. I ended up using extra the money made from selling the machines on a number of strippers and whores.
I don't miss the other machines one bit, nor do I miss the backlit keyboard, but I may upgrade whenever a new MBA comes out with one just for the style factor. I also love the trackpad on my 13" MBA as I find it's way better than the ones on my MBP or 11" MBA, as the clicking noise is as minimal as possible.
I'd rather have fun with a number of strippers and whores, than having a bunch of machines and devices that sit around unused, as one person can only use one machine at a time. Unless you are a major geek who doesn't like a variety of woman because there are more things to do in life than using a computer after all.