Nearly all media interaction are now carried out on screen-based devices. Google produced a nice study that shows many interactions now occur across multiple platforms. We frequently call this multi-screening but Google have offered a deeper insight into how the flow over the devices occur and go further to show the breakdown.
Like chains in the real world, efficiency is frequently limited by the weakest link and for many companies today that weak link is the mobile offering. With a staggering 2/3rd of customer journeys starting on smartphones, you can easily see why thought leaders are mobile-first.
The survey is US and is aimed at online purchase but you’d be making a big call not to embrace mobile now.