The major concern when using the iPad to perform any kind of work, is the limitation of iOS compared to OSX. You can't really expect to do any work like web development or even graphic-design from iOS, as the author mentions.
However, nowadays considering portability, it is way preferable to simply take the new 12' MacBook with you rather than iPads where it is still possible to perform the same kind of work, under reduced performance, but with the same freedom as from a MacBook Pro.—This should cover concerns against weight, durability, etc.
The major concern when using the iPad to perform any kind of work, is the limitation of iOS compared to OSX. You can't really expect to do any work like web development or even graphic-design from iOS, as the author mentions.
However, nowadays considering portability, it is way preferable to simply take the new 12' MacBook with you rather than iPads where it is still possible to perform the same kind of work, under reduced performance, but with the same freedom as from a MacBook Pro.—This should cover concerns against weight, durability, etc.