What valuable company is nobody building? The next Bill Gates will not build an operating system. The next Larry Page or Sergey Brin won't make a search engine. If you are copying these guys, you aren't learning from them. It's easier to copy a model than to make something new: doing what we already know how to do takes the world from 1 to 10, adding more of something familiar.
"Every new creation goes from zero to one. This book is about how to get there. Peter Thiel has built multiple breakthrough companies, and Zero to One shows how." (Elon Musk, CEO of SpaceX and Tesla)