David Chartier:
For all the incredibleness of the MacBook Air’s new battery, the device is still dependent on WiFi hotspots and, let’s face it, the internet is an essential ingredient these days for getting most things done. Now, keep in mind that adding 4G radios to the MacBook Air likely poses its own share of challenges that Apple has clearly decided to avoid for the Mac, at least so far. In general, it seems like 3G/4G radios have never been very popular in notebooks for some reason.
I can see why David wants cellular data in a MacBook, but I guess I don't find it to be much of a bother to just fire up Personal Hotspot on my iPhone.