The Cloud: is it just your neighbor's computer?

"There is no cloud. It is just someone else's computer." This is often said to demistify 'the Cloud'. On one hand this is true; it's just a bunch of computers in data centers around the globe. However, it's also my own computer in my attic. On the other hand, the cloud is a concept that is more than borrowing your neighbor's computer. The cloud is like a tunnel, a gateway to powerful, shared computing, letting you use and store data far beyond your own hardware's limits.