Working through and testing these modules has been exciting and interesting, and I hope that I have encouraged you to take a look at what is possible now and what might be coming soon for CSS.
Learning about shiny new things that we can’t use yet can be frustrating, but it is also important if we want to move forward. Participation in creating and testing these specifications is not something only for browser makers and big companies. If we want to see these modules in browsers then we – the regular web designers and developers who use these features – can get involved too. Take a look at Move the Web Forward: there are links there to help you get involved with the standards process in a variety of ways.