Via Wired:
When you comment on, or upload a video, YouTube will now urge you to “start using your full name on YouTube,” and ask if the video-sharing site can begin displaying the identity you’ve associated with your Google+ account (assuming you use Google’s social network). If you decline, Google makes you select a valid reason, like “My channel name is well-known,” as BetaBeat noticed this morning. (Google didn’t mention that wrinkle when it announced it would be rolling out this option.)
As much as this is about reigning it the juvenile comments that seem to pepper every video posted to YouTube, it’s more about legitimizing Google+. Real names will lead to more clicks on profiles. Don’t be shocked to see Google merge YouTube pages and Google+ pages as soon as they’ve pushed enough people into using their real names.