Again, pointing out the obvious, but you can't have multiple windows open on the same screen, so if the aim is to multitask, you'll be switching back and forth between apps. This is easier on iOS 7, but still more of a hassle if you're trying to work between multiple documents.
Let's not forget about price, either. The cheapest 11-inch Macbook Air will set you back £849, compared to the 16GB Wi-Fi-only iPad Air's £399 price tag.
iPad Air vs MacBook Air comparison review: Conclusion
As you've caught on by now, trying to compare the iPad Air with the Macbook Air is comparing apples or oranges. Sure, you get some of the same things from both products, but ultimately they're two different products offering different experiences. And it's up to you, the buyer, to decide which is best for you - or whether you'll just get both.
Sign up for CIO Asia eNewsletters.