RealID to come to the Official Blizzard Forums

[Maxion]

Most likely you will still be able to read the forums without your name being shown to anyone else anywhere, it will only show up if you make a post.
And they are not linking armory to realid, everything realid is still going to be an opt-in thing where if you don't want your real name shown anywhere, it won't be. Just don't opt in.