The question here is that even if I sell the iPad I would only buy the MBA far later. 8 months later, in the best of chances, to be precise. Realistically speaking, perhaps 1 year.
On the other hand, if I did not sell the iPad, I would buy the MBA in 15 months. Once again, assuming optimum saving conditions. Realistically maybe 2 years.
Can my laptop hold on 2 years? Maybe. But I am sure that if it doesn't my parents would pay for a new one... and I could give the price difference for the MBA.
I was not depending on the iPad to replace my laptop on the go, but basically at faculty. I am a med-student. I was expecting it'd be good for checking out medical apps (pharmacology, radiology, anatomy), e-mail, browsing, taking notes on Keynote during classes(I tried typing on it today at a store, I was pretty good!), maybe creating drafts on Pages, reading PDFs, and possibly do some begining musical creation (Garage Band for the iPad).
Keep on the brainstorming!