Adobe just launched the Open Screen Project, an initiative designed to easily move content and applications across devices:
This initiative provides one more motivation for adopting Flash for rich media and interactivity to take eBooks beyond static paper-like experiences and make digital content more compelling to consumers … More and more, digital publications — whether downloaded or consumed online — are going to incorporate interactivity and rich media in order to deliver more value to their readers. Digital textbooks are going to integrate eLearning experiences, such as simulations and assessments. Trade books are going to incorporate value-added elements, a la DVDs, such as video interviews with authors and socially-networked play-along whodunits.
As TechCrunch notes, Google, Apple and Microsoft all have their own interests and initiatives in this burgeoning mesh/cloud/interactive space.