Ben Thompson gets the Chromebook better than any one else, possibly because he uses a Chromebook Pixel himself:
In fact, the best comparison for a Chromebook is not a Windows PC, but an iPad. Both are appliance-like devices that are easy-to-use, impossible-to-break, and designed first and foremost for the experience, not the feature list. And, if you write like Dr. Drang and need multiple windows, a Chromebook is in fact superior to the iPad.
Spot on. Both Chromebook and iPad are examples of what I call “friction-free computing” – devices which remove the cruft and hassle of an old operating system, requiring little to no maintenance. What this class of device allows you to do is live in the applications you use to get stuff done, with the operating system getting out of the way.