I think it will be some form of democracy or cooperative. The authors mention the creation of internal stock markets at some companies, that let employees invest in new ideas, either with money or discretionary time. Tools like internal stock markets are fairly easy to build, so we may see more of this "wisdom of crowds" decision-making.

Look at how the open source community drove the creation of blogs and wikis for collaboration, as they needed better tools to coordinate their programming efforts. I think that the OS community is the first generation of Management 2.0