I'm surprised by the amount of negative comments. Independently of what do you think about HTTPS and CAs in general. Given there the alternative currently is plain text, I'm actually surprised that it wasn't a signal before.
I see this has negative for several reasons : * Certificates are expensive (to buy _and_ to manage) * Crypto is hard and there will be a lot of screw up with inadequate certs in the wild for a long time. Just having a certificate does not mean much if it weak or broken. * Can't help the feeling it's an indirect push for cloud business hence possibly eating the margin of freelancers / ISV * Security Theatre : a lot of…
The points you mention are in fact indicators that someone has put care and resources to make their site work more securely, which says a good thing about the site, which google rewards with some points in their algorithm. Makes perfect sense to me that this will somewhat improve the quality of their results. Would you also complain about google using fast response times as a signal because that "forces" people to pay for better servers?
About your security point, google can not do that without loosing 50% of its customers, I really don't understand what that has to do with the rewarding HTTPS being good or bad. Looks like a red herring.