The fact that the broad learning theories were developed before learning was impacted by IT is a valid start point for look for a new approach.
The half life of knowledge is shrinking so in many circumstances what we don´t know is more relevant than what we really know.
Learning depends on learner experiences with the world, but the learner can´t be exposed to all the experiences necessary to get all the knowledge he should need. That´s why "other people´s experiences becomes the surrogate for knowledge". I find that this is the key of the connectivism approach.
The knowledge workers and the learning organizations are totally exposed to a chaotic environment because everything is connected with everything and it forces them to form connections to create patterns of information to enhance their decision making process in this chaotic environment.
The Connectivism theory looks for address this challenges.