If a tree falls in a forest, does it make a sound?
Joking aside, why should I care? Does it offer me much better privacy than Gmail? I don't think so. I'm actually predicting I'll be moving away from Gmail after many years of using it, but it certainly won't be for Hotmail or Yahoo mail or any like this. They're all relatively similar from a security and privacy standpoint.
I'll probably switch to MailPile or whatever e-mail service looks great, is free, and uses the DarkMail protocol