the iPad air is great for traveling as well as basic web browsing on the couch for example with out having a heated laptop on your legs..
you can do your work on it using iWork for example or game.. I think its been very useful so far, it is limited with iOS as you cant change the default browser with out jailbreaking for example but it has a SSD and you can get up to 128gb with cellullar which is handy, I would go and play around with one in an Apple store and see what you think.