What are the next steps/milestones?

Hi everyone, I'm quite a newbie on the subject and I'd like to know what the next steps will be for Ethereum in the near/far future. Is there a timeline disponible somewhere? And what are your thoughts on that? I think I managed to get that there will be a great technical evolution in some times, but I must confess that I have no details on that. If there is a place to have a global timeline with explanations for every milestone, I would be awesome!!