4G Technology

I have decided to change my topic and study to 4G Technology.
What is 4G -- Wikipedia state
4G (also known as Beyond 3G), an abbreviation for Fourth-Generation, is a term used to describe the next complete evolution in wireless communications. A 4G system will be able to provide a comprehensive IP solution where voice, data and streamed multimedia can be given to users on an "Anytime, Anywhere" basis, and at higher data rates than previous generations.
It goes on to say:
There is no formal definition for what 4G is; however, there are certain objectives that are projected for 4G. These objectives include: that 4G will be a fully IP-based integrated system. 4G will be capable of providing between 100 Mbit/s and 1 Gbit/s speeds both indoors and outdoors, with premium quality and high security.

I think the biggest study question is around the dynamics of how it will be used. With such higher bandwidth, it's not just going to be mobile consumers with basic Internet access on their phones, it could be everyon.
What will be the driving applications?
What applications?

Thoughts, comments?