I don't typically make new news posts for a single Blue comment but this one is pretty big. As of the beginning of Arena Season IV almost all pieces of PvP gear will require an arena rating greater than 1500. This means of course that teams who are only playing to farm points will have a difficult time buying anything other than Gloves or Belts or a few other pieces.
That is correct, even the Season IV gear that requires BG Honor is still going to require an arena team rating. While that doesn't quite seem to make sense I can see where Blizzard is going with the idea.
This is going to change a lot of opinions about farming PvP/Arenas for PvE and with some of the other changes going into effect it is going to make selling top rated teams much less desirable.
There is quite a bit more to go along with this but your best bet is to go to The Original Post By Drysc and get the news directly from the source.