Very carefully? LOL. I'm not on the team that would be pushing a new feature, but as you see new features on board you can probably guess based on announcements. Features come in through a set of stages, typically starting with a private preview that allows a smaller group to weigh in and test and provide feedback, before going into public previews and finally general availability. In fact there's a few features in preview right now: azure.microsoft.com/services/preview and you can sign up to be a part of the process.