Someone else pointed this out...
Pilots are specifically prohibited from accessing the internet on airplanes so equipped. This means that, with difficult weather conditions....like lines of thunderstorms....the guy with the iPad in 10C has better weather information than the captain of the flight.
I am not advocating that WiFi be made freely available for web surfing in the cockpit, but if the airplane actually has WiFi capability, would it not make sense to use it to the advantage of better real-time weather information?