It is in its infancy right now though..and is exeriencing a few 'teething' pains, but this will pass.
I see wireless access as the next really big thing... in 2-5 yrs nearly everyone living in a non.3rd.world nation will carry devices 24/7 that connect them to the net wirelessly.
I think that in a few years the cost of high speed net access will begin to go down.... mostly due to innovative last-mile solutions and grass roots wireless network access.
Also the business sector will do all in its power to reduce or remove the cost of using wireless access devices... they want us all available online 24/7 so they can deliver instant spam.
The low-cost wireless web access devices will totally spoil the current business models for cell phones... they will mostly go into bankruptcy as people decide they can get by with the free 2-way audio features on their web devices.
As the costs of web access go down we will see almost everything get connected to the web.... TV's, ovens, garage doors, hats, glasses, toasters, u.name.it and someone will put it on the net :-)... we will have to go to an expanded IP address scheme otherwise we will run out of available numbers.
20+ years or so down the road the net will begin to expand into areas that many will not be comfortable with... nano-tech will likely enable easy direct connection with the human body. The beginnings of a virtual reality type connection between people and machines... and direct body to body connections over a high speed network.