In-flight WiFi service

I flew to Tokyo today by Cathay Pacific CX548.  When the plane elevated to a certain altitude, the Captain announced that electronic devices of passengers could be switched on.  However, any devices that use WiFi or Bluetooth should be switched off in order to avoid interference to aircraft electronic systems.  Hey, Captain, are you kidding.  In-flight WiFi is an essential service for passengers especially for those flying long haul.  Can you imagine losing Facebook or Gmail for 12 - 14 hours while on the sky.  Boeing aircraft are already providing in-flight WiFi service. Of course, usage charge must be imposed. What's wrong with Cathay Pacific.