e-mail on paper - What difference would it make?

While logging into gmail today I noticed the announcement of Gmail going onto paper to support those hard-core handwritten letter champions.See more about it on http://mail.google.com/mail/help/paper/more.html.I really didnot understand the idea behing this.I respect Google for its ever creative internet services it provides to its mammoth sized,ever increasing user pool.But this particular product that they have come up with doesnot make sense to me.After all if I need a paper copy of my e-mail wouldn't I send one myself.The only advantage that I might have with Gmail Papar is that I get this copy free of cost(if I don't mind advertisements on my letter pad that is) , but then how much legal credibility can I claim to this....anyways I hope to get more points of view on this, provided you care to express it here in the comments.