What do the Swedish city of Jönköping, Atlanta in the US and Birmingham all have in common? They have all now hosted DreamHack - one of the biggest e-sports festivals in the world and described by promoters as the "Glastonbury of gaming". The National Exhibition Centre is hosting the first ever UK edition this weekend, with 50,000 people expected through the doors. If, like me, you are not much of a gamer and think it is all teenagers in headsets, basement dwellers and button-bashing, I am here