Do you think I could use the 11 inch macbook air as my primary computer. With the 1.4 GHz Core 2 Duo 4GB of RAM and the 128GB flash storage.
I will mainly use office, iWork, iTunes, Safari, and rarely iLife. I need it to last me 3-4 years. I like the small screen and don't want to wait for the next gen.
IMO, only you can answer that question.
That said, I would hate to have to have my Maxed out Macbook Air 11" be my primary computer, although I'm sure I could make do if I needed to.
I have grown fond of my iMac i7's 27" screen and its speed and viewing, etc.
Recently, I had to use my old G-4 12" Notebook for over two weeks, on a vacation on the Oregon coast. I was mostly doing work in iPhoto, e-mail and 'surfing the net,' with it. I noticed a few problems with being hunched over reading stuff which caused a few neck & back strain problems, etc.
Of course, I'm still using OS 10.4.x as well as OS 9.x on that Notebook as well.
I really purchased the Macbook Air to use on trips where I have to fly, usually to catch a cruise ship and on the ship using the ships WiFi. (I was using an 2nd Gen. iPod for this in the recent past.) The Macbook Air will also become my primary Notebook when the G-4 12" goes down.
I had considered buying an iPad; however, when this 11" Macbook Air came out and I read the specs and reviews on it I decided it was a better deal for me then any iPads, etc. To me it's what the iPad should have been.