A couple of good videos which sum up the value on blockchain, from the father/son team of Don and Aex Tapscott. The beginning of the second one repeats some of the introduction from the first one, but is more up to date. Well worth watching if you are wondering what all the fuss is about, and how blockchain is going to change the world:
How the blockchain is changing money and business | Don Tapscott
Alex - update from recent Swiss conference