This site has an interesting post about Mobile 2.0 (From the post):

"Mobile 2.0 is almost as much about the end user as it is about the device or the service whereas Web 2.0 doesn’t exist with out the combination of the two. In a similar vein, Mobile 2.0 is morphologically amorphous - the form of the device is constantly changing and shifting. As Walter Mossberg said at a keynote last year, Mobile is the most important new technology but we have no idea what it is going to become."

What will mobile devices become in the future? Perhaps the closest answer lies with the pioneering work by Mark Weiser and Xerox Parc labs and their Ubicomp framework.

“Ubiquitous computing names the third wave in computing, just now beginning. First were mainframes, each shared by lots of people. Now we are in the personal computing era, person and machine staring uneasily at each other across the desktop. Next comes ubiquitous computing, or the age of calm technology, when technology recedes into the background of our lives.”