>> will there be trains, cars and airplanes after
>> Mashiach comes? probably. Why should the
>> Internet be any different?
Definitely. I hope the technology at that time will be much more advanced then today. Having studied the development of technology, I hope that by that time the Solar System will be colonized and there will be resources for trillions of people.
Rabbi Asher Crispe has written many optimistic articles about technology.