As Mobile keeps growing an effective mobile Interface Design will become the primary design focus.
Interface design is quickly moving to a mobile first methodology. The rapid rise of smart phones and increasing levels of mobile internet browsing will require the user experience on mobile devices to be the first interface design consideration. The interface will then have to expand gracefully to larger device displays (tablets, laptops, desktops, game systems). This is an inversion of the traditional idea of degrading gracefully common with supporting legacy browser versions.
Checkout this great slideshow about it.