Tablet takedown: the best (and worst) of 2013 – video review

It's been a bumper year for tablet devices, with new and improved products released from established technology giants Apple, Microsoft, Google and Nokia. But there have also been some surprise new budget entries on the scene from high-street retailers Argos and Tesco. So, just in time for Christmas, Charles Arthur and Samuel Gibbs take us through the best – and the worst – tablets of 2013