I have quite a few OLED domains so I'm a huge supporter. I also attended their last shareholder meeting in July and I've invested in their stocks. I think the key thing here is not "if" OLEDs will be huge but "when" and this article by CNET supports that case.
First mover advantage here on domain keywords so get them NOW. Flexible/OLED TVs, PCs, Laptops, Phones, etc. Get em before they're gone (although I've bought up a lot of good ones already )