From the high-tech world (in the IT, not the aviation sense) I can assure you that electronic communications are not all they are cracked up to be. Anyone who has attempted a video conference will have a good idea of what I am referring to, in terms of not quite understanding, the amount of times you have to ask for the question to be repeated, the inability to read body language, hiccups with the technology, etc.
It's all very well to have such meetings for admin chit-chat, but for serious stuff (read the sort of pax in F or J) it just doesn't work and if you attempt you will be beaten by your competitors who work conventionally.
E-mails have however dealt business letters by post a real death blow. Must be something for the overnight express carriers to consider.