Last year I was extremely privileged to be able to attend LEGO World in Zwolle. This year I am insanely jealous that I couldn't make it but luckily Xander has been taking plenty of video for us :)
Matthias has already posted Day 1 (KiNXT sumo's are cool!) but here is Day 3 and Day 4 (not sure what happened to Day 2.... will need to have a stern word to Xander!)
Highlights for me from these videos were the NXT Blimp and Vending Machine.