When you've got Windows 8 'metro' interface open it's got your MS Account right at the top for the world to see. I often use my laptop in public places and I'm not keen on having my primary email address visible to anyone sat next to me. Is there a way to hide (or at least rename it?)
You need to log on your microsoft account and fill out your first and last name, then log off and back in.
After that, your name will appear instead of your email.
Alternatively you could convert your live account to a local account, but that would obviously stop the syncing with Microsoft services.