I just published a new paper titled "Mobile 'systems of interactions' driving business innovation" located here: http://ibm.co/13WBssY
The paper discusses how systems of interaction are broader than just the code running on the mobile device, and how these systems are transforming how enterprises are running their businesses. I also discuss some of the unique aspects of developing these kinds of software systems.
There will be more about this topic presented at the upcoming IBM Innovate 2013 conference, June 2-6, in Orlando. I hope to see you all there!