SSL Certificates - Should I have them on all my sites now?

Hey there,

I've been told that Google has started an initiative that all sites have SSL's in an effort to push for safe web browsing. All of the sites that I run, so far, don't have a store or any ecommerce features, so no exchange to personal information which is why we haven't gotten the SSL's for them. Should I have an SSL cert on all my sites now? Is that something that I need to do? I wasn't sure and figured the experts at WPMU would know best.

Let me know what you think.

Thank You,
Mark