CES is pretty big. If you haven't already had it explained, it's a sprawling collection of cavernous halls, hotel suites and in-town meetings that require an unhealthy amount of coach trips and taxi rides. We've pulled together some numbers to help demonstrate the sort of scale involved but when you involve the likes of Sony, Samsung, Panasonic and more than 150,000 attendees, it's going to get a little messy.