@Jerome, what your are saying might be right, but I think techonlogy also changes the way people behave. I'm 19 and I grew up with computers, but I grew up with them in a differnet way young people do today. Let me give some examples, why people will have very much the need for Internet everywhere. All younger people I know, especially the girls, use social community websites like Facebook (or SchuelerVZ in Germany), and they use them a lot. Even the people at my age do, when our class is in the computer room of our school with no particular job to do, they will play flash games, surf social community sites, write email, watch youtube videos and all this stuff, though they all could also be only talking to each other. What people will do is watch the videos with their friends and have a big laugh or chatter away about the newest photos on the social community website.
And all of them will use IM much more often then they use their telephones.
The Internet is not the place of Information it once was, it's THE place for entertainment and communication. Just imagene how hard it is to plan a party for the evening and inviting say 20 people if you had to phone them and even if you did, you would easily miss someone. it's much easier to jst write an anuncment on your profile.
And if people are using these services, they want to use them on the go aswell.

The point why all these new techniques aren't going anywhere is their bad design. Absolutely no one wants to download a blockbuster movie on the go or buy music while on the road. People don't want those fixed services, what they want is the Internet and only the Internet.
Getting the true Internet mobile however is at the moment only possible with either Nokia N8x00 or an iPhone. One of them is geeky, the other one is expensive the second part being the biggest problem, at the moment mobile data is way to expensive and is always kept in the guided routel of the carrier.