If Google+ does eliminate the need for other services it might start with you NOT writing a blog post, emailing it or tweeting a link to it but simply using G+ to write it and then deciding how to share it. Make it "Public" and it's a blog post to the G+ world, direct it at a Circle (or Circles) and it's like a tweet.
Aim it at your class Circle and it's a post with a discussion below it. Direct it to one friend and it's email.
If you aren't using any social media tools already you may want to a) jump in now with G+ and have all the tools b) continue to stay anti-social. If you are already using the other tools for classes, I would think you'd want to start experimenting with G+ and compare the experience.