Service is something that is too broad as a word to consider explaining it in just a few words, but the way certain services are provided now has changed a lot. Now we can order fast food online and we can be taught how to play a certain instrument via webcams. The way that services are given has changed a lot and in 100 years, it’s likely that a very realistic virtual reality system will be available. You will probably have your own virtual assistant at home in the form of a virtual reality person or character that you can customize.