I fail to see how what Snowden has done has promoted world peace. The Nobel Peace prize is not (recent awardees notwithstanding) a we-like-you prize. It's supposed to be about world peace , and I just don't see how Snowden has advanced that particular goal. Or am I just dense?
If the Internet is being militarized, Snowden has pointed that out. He's shown that the NSA is actually one of the "standing armies" that the Peace Prize rules mention. Now we can talk about reducing it.
I still think it would be a stretch to award him the Peace Prize, but anything that keeps the Internet from becoming a war zone promotes world peace.