What is the reality of mobile learning in corporate organisations?

At the start of 2011, it was widely thought that this would be the year when mobile learning, or m-learning, would reach a tipping point and become part of mainstream learning solutions.

So, surrounded by all the hype, what actually is the reality at the end of the year? What is its role in the learning mix? What are the key opportunities and challenges in the adoption of mobile learning technologies?