Soon as 4k oled drop in price to 3500 dollar range I'm all over it.
I'd say you have a year before that happens in the 65" size (next gen) as they have zero competition Globally.
Also, Black Friday means nothing to Flagship reference panels as they almost never receive discounts during BF season - the panels flying off the shelves are the bare bones budget models not high end. Flagship panels have never needed such discounting until model year transitions occur and a perfect example is Sony 900A series were cut 50% and a tactic Sony does annually to clear inventory.
The 65" OLED will retail for about the same as the Sony 950B until it clears out in 2015. Flagships often mirror pricing of their competitors. LG likely will have advantage of being reference quality and only OLED in the game in these sizes for 2014 anyways. Don't ever expect a Reference flagship to carry a price of a Vizio.