At some point technology will advance to the point where we will be able to see and hear distant friends and colleagues through augmented reality glasses, in a way that closely approximates the experience of sitting across a table from them.
At that point, perhaps a new kind of restaurant will emerge, one which caters to a clientele that enjoys sharing conversation over a good meal with distant friends, but seeks to avoid the time, expense and inconvenience of air travel. Perhaps at some point even the waiter will be virtual, appearing to serve food that is actually delivered to your plate by robot.
Remember feeling that buzz of sparkling conversation all around you, the last time you had a great time in a fine restaurant? Maybe, just as eBooks might replace paper and ink, the experience of going out to a restaurant might end up being something we will one day enjoy in the comfort of our own homes.