I'm looking for a personal project involving IPFS. I know that a lot of people say that IPFS is going to revolutionize the way we think of Internet and its the future and so on and so forth. I fully agree with this. But, from a practical stand point, I am wondering if there is any kind of service that absolutely necessitates the use of IPFS. In other words, is there something that I can work on that isn't already accomplished by a traditional, centralized service?