Mark Shuttleworth Blogs that Ubuntu in 2013 is all about mobile.
That’s why Unity in 2013 will be all about mobile - bringing Ubuntu to phones and tablets. Shaping Unity to provide the things we’ve learned are most important across all form factors, beautifully. Broadening the Ubuntu community to include mobile developers who need new tools and frameworks to create mobile software. Defining new form factors that enable new kinds of work and play altogether. Bringing clearly into focus the driving forces that have shaped our new desktop into one facet of a bigger gem.