The boom in mobile device sales accelerated in 2013, with more than four times as many smartphones and tablets as PCs shipped in the UK: smartphones accounted for three quarters of mobile phone sales, and shipments of tablets surpassed PC sales, which fell sharply. By 2020, we forecast that smartphone penetration will rise from two thirds of the population to over 80%, and the number of tablet users will exceed 60%, outstripping the PC internet audience, which we expect to shrink. We now predict that the majority of internet usage will go to mobile devices this year and three quarters by 2020. Mobile is well on its way to becoming the predominant access platform in the UK, as in the US, and most, if not all, future growth in commercial internet revenues will be driven by mobile devices.