The underlying principle of exchanging information worldwide by digital means will not change.
The methods however will change as technology develops. Speed will increase tremendously so people in 10-20 years will look at our average connection speeds the same way we would look at a 56k modem.
As technology begins to mesh with biology i fully expect something similar to direct neural input, i.e. the signal will be transferred to our brain where we can access and process the data the same as with any other input via our senses and vice versa.. we need to "write" a message but instead of hacking away on a keyboard we just do it in our thoughts and the system converts it to electronic data and sends it out.
Now this is obviously heavy Science Fiction currently but the first steps are being taken right now towards a man/machine interface. It will just take time.
Years ago i played a roleplaying game called Shadowrun /a magic/technology cyberpunk game set in the 2050s and onwards) where people could log into the Matrix (way before the movies came out
) and do their business in person instead of via a screen.
Technology has progressed so far in this game that it was an everyday part of life and people would get the dataport implant like they would get a smartphone today.
It still had an artifical feel, i.e. you were aware you were in a digitally created surrounding but there were some prototype, highly advanced areas in the Matrix (usually secret systems from corporations and governments) that you couldn't distinguish from real life.
While this may be a game i fully expect this to become reality at some point and even revolutionize the entertainment industry because you could participate in a rather than passively watch it happen and who wouldn't want to be Luke Skywalker or The Terminator? It has the potential to be a realistic version of the holodeck.
