Natfka has this picture emailed to him yesterday. This is a good indicator Eldar are indeed about to get a new codex; and that more races are going to more single plastic models.
The fact Game Workshop are producing these is quite remarkable. They have to sell a lot of plastic models to make money after the expense of creating the moulds. Which is why they have tended to go for units which could feature multiple times within one army. They must be very confident that the Eldar range is going to sell well and that existing Eldar players are going to want a new Farseer in their collection.