Pure PVE server would you welcome it.
The idea is you would be unable to have any level of world pvp, with exceptions of places like Wintergrasp or Tol Barad. Battlegrounds and arenas would still exists but quests requiring them would be removed.
You would also be able to group with people from the opposing faction and/or you could choose what faction you wanted to be regardless of race.
I would welcome and love this I am only a pve player and loathe pvp with every fiber of my being.
I am quite confident that the pvp types you find on pvp realms would not like this idea, because it seems that trolling and griefing those of us that have zero interest in pvp is a large part of the game for them.