LG's OLED investment has been long known and expected. Most of it is for small displays such as cell phones where OLED's are starting to dominate and continue to grow. Up to now, Samsung has been the only company with the ability to mass produce small OLED's, that's why the LG investment was made. It could also be in hope of supplying oleds for the next generation of iphones, since most analysts predict that is where Apple is heading.
FYI, Samsung is putting even more money into OLED fabrication. The success of the S6 Edge has put the spotlight on foldable and bendable displays, and right now that's OLED.
As for larger displays, LG makes both OLED and qdot sets. They have achieved a lot of success in bringing down the cost of the non 4K oled displays but so far the 4K displays still produce too much waste to be profitable. As long as that continues, expect LG to maintain both qdot and oled televisions.
