Because, as he mentioned, it has upside. That whole personal touchy-feely interaction thing that seems to sell people on it in stores, the bulklessness of it that lets you use it as an eReader in bed, it's much lighter than these, the battery life is longer, etc.
These Chromebooks might share the iPad's limitations, but they don't seem to make up for it with any strengths that you couldn't get out of a regular netbook.
