SSL Updates by Google are not about SEO. I believe Google are pushing for sites to implement a Secure Socket Layer Certification from a security perspective to protect hackers who use their browsers (Chrome) to hack sites.
The recent SSL announcement is a long bow drawn by SEO agencies to suggest their is another algorithm change. It really isn’t. We have worked with top clients like Skybox Security, ThreatMetrix, ZScaler to name a few. We’re all aware of the massive rise in identity theft and efforts to protect online consumers. With Google Wallet, Google Apps, etc, – Google want a more secure web period and their motivations are not about giving sites more traffic if they include an SSL, rather it’s to protect users data from being hacked.