> Last, and possibly most important, is the misconception about how easy it is to launch a profitable mobile app to millions of users. Zynga now hosts about 80% of their games on their private cloud (the zCloud). This infrastructure separates Zynga from a group of 15 hackers who want to make the next Angry Birds.

Sorry, I don't buy it. You don't need to host your own infrastructure to schlep virtual cows around. Zynga probably saves some money in self-hosting but that isn't going to make or break a title.