Here is an article by Jason Snell (former editor of MacWorld magazine) wherein he explains how the iPad has almost -- but not quite -- replaced his Mac when he travels. I can identify with this article. I have both a Mac laptop and iPad, and find I tend to take my iPad with me when I travel. For several reasons: it's lighter; it has cellular capability (which I find very useful); and with a Zagg Bluetooth keyboard it makes typing so much easier (for me, anyway). Having said all this, though, overall I still prefer the greater capabilities of using my MacBook Pro at home.