Me, exactly one year ago:
For me, an ultrabook would fill the niche between my souped up desktop at home, and my smartphone. As a “power user” and developer with very specialised software requirements, I need the lightest possible machine with decent battery life, a full sized keyboard and the ability to run desktop applications. My back can’t take carrying a 15 inch MacBook Pro any more. iPads and Kindle Fires can’t fill that roll, nor are they intended to.
I was commenting about Intel Ultrabooks, but I’m now a proud owner of a MacBook Air, so it’s all good. To use some of Apple’s language, it’s wondrous how all my above requirements were satisfied with it.
It also occurred to me that I used “roll” in place of “role”, again. Ever since I was a little kid, I’ve used the words “dishwasher” and “washing machine”, “elbow” and “shoulder”, and “roll” and “role” interchangeably, even though I know better. Old habits dye hard.