Quantum Dot to us really just means a potential step up from non-OLED technology but still not as good as OLED. Most content that is available today does not have a color-space that would allow the Quantum Dot technology to shine. Still, anything that improves the color gamut over the usual technologies is a step in the right direction. The figure that is getting quoted repeatedly is that Quantum Dot is 30% better (in color reproduction) than standard LCD TV’s (although this is probably the best case scenario with properly sourced content).
This TV can handle 4K 60p, H.265, and has LG’s webOS 2.0.