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Many people have a narrow view of innovation, invention, and technology. The dictionary defines to "innovate" as "to introduce something new; make changes in anything established." The word "innovate" comes from the Latin "innovātus, past participle of innovāre, to renew, alter, equivalent to in + novātus (novā(re) to renew, verbal derivative of novus new + -tus past participle suffix)."
All that music is is a rearrangement of notes. A composer came up with a groundbreaking new work. He didn't invent a new musical scale or any new instruments. A writer came up with a pioneering new novel. He didn't invent a new language, or coin any new words. A chef comes up with a refreshing new dish. He didn't invent any new ingredients or cooking methods. He combined existing ingredients and cooking methods, often from different cultures. If anything, combining and altering existing things is the essence of innovation and invention. The vast majority of patents are about combining existing components and methods.
Indeed, throughout history, the best inventions have been those that utilize existing things. Some of the worst inventions have been precisely those where everything was new. This is often the reason they didn't take. People tend to resist change, and completely new things are often difficult or even impossible to understand.
Apple has already been mentioned. It has perfected the methodology. Take existing, matured components and technologies, combine them into well-made products with an unprecedented level of "niceness".
Facebook is another example. Before facebook there was MySpace and Friendster, and well before that, Goecities. Many people had personal and family mini-facebooks. It's nothing but an online college facebook, literally. Yet, Facebook is an innovation, as was MySpace and Friendstar. Having "relationship status" as a field is genius.
Micropayments and microloans are two other examples. The core ideas are nothing new. They are extensions of the existing concepts of payments and loads to allow far lower amounts to be transacted. But, if done properly, it makes a real difference in the lives of hundreds of million, perhaps billions, of people.
In a number of African countries, mobile banking is done via SMS text messages. That it uses an existing system is precisely what makes it good. For many people who never even had bank accounts, this changed their lives in fundamental ways.
Back to China. Take the example of a girl who sells peanuts out of a cart on the side of a street. All she wants is to sell peanuts and take payments. Before, she could only take cash. Anybody who didn't have cash or prefered to pay some other way, she would lose as a customer. And cash comes with problems. Someone might rob her, she had to go someplace to deposit it, and so on. She is not going to get any kind of terminal to process things. She can't afford it. The fees alone would wipe out her margin. And seemingly trivial things (for those of us fortunately enough to be from the developed world) like having to plug the terminal in somewhere would be a big problem.
With a system like WeChat (just an example), after applying for an account, all she needs is the printout of the QR code. She doesn't even need to have a smartphone with her. This last point is genius. She will likely get more business if people talk about her online, and so on. That it doesn't require new hardware is precisely what's so innovative about the system. It can be deployed, at massive scale, almost instantly. Several hundred million, indeed up to more a billion people in China alone are turned into cashless mobile merchants. And all this is done without any new physical infrastructure, or any top-down system imposed by the government. Potentially this can be deployed, at equally massive scale, elsewhere. The lives of billions of people can be changed.
Here in Silicon Valley the mobile landscape in China, and WeChat and Tencent in particular, are being studied very intensely. Questions are being asked by very serious people and companies. Why is it that Tencent can monetize things so well? It has per-user revenue several times higher than that of Facebook, all without relying heavily on advertising.
At the end of the day, whether some people halfway across the world think something is innovative or not makes absolutely no difference. Lives, by the hundreds of millions, are being changed, for the better. That's all that matters.