Amazon and Google will bump up against each other in cloud computing services and other areas in 2013, Alexei Oreskovic and Alistair Barr write in this analysis. "Amazon wants to be the one place where you buy everything. Google wants to be the one place where you find everything, of which buying things is a subset," said Chi-Hua Chien of Kleiner Perkins Caufield & Byers. "So when you marry those facts, I think you're going to see a natural collision."