Court Decision regarding pivacy of emails

A federal appeals court today made a startling decision about the privacy of emails: they determined that 3rd part ISPs must consider their subscribers' message content private unless they notify them that it is not or allow them permission to read them, if I read this article right. That is a turnabout from what we've been expected to believe, essentially, as the writer of this article describes, making email more like a sealed letter than an open postcard.