Direct quote from google:
"For now it's only a very lightweight signal - affecting fewer than 1% of global queries, and carrying less weight than other signals such as high-quality content - while we give webmasters time to switch to HTTPS," Google's Zineb Ait Bahajji and Gary Illyes said in the blog post.
"But over time, we may decide to strengthen it, because we'd like to encourage all website owners to switch from HTTP to HTTPS to keep everyone safe on the web."
So how effective is it right now? Not much at all so its like another browny point to your SEO but its not going to make a massive difference right now.
This is the clarification we needed.
So there is no panic and no need to jump on it asap.