Let’s be honest: The ultrabook phenomenon is by and large Intel’s and the rest of the PC industry’s reaction to Apple’s MacBook Air. Just take a look at a lot of the designs and the features: the influence (and in some places the outright imitation) is obvious. However, while the ultrabooks on the market today have all tried to mimic and beat the Air on one thing or another — price, more storage, and so on — none have managed to pull it off.
via MacBook Air with Windows 7 review: the ultrabook to rule them all? | The Verge.