Do you foresee a time when OLED's can match the brightness/color pop of LCD sets like the KS8000?
They do in their own right because of the difference in contrast, colors are more defined on an oled to me. It's hard to explain the differences in a quantifiable way because the device you're watching on in a comparison video etc can't do it justice for many reasons. You'd have to see it side by side on two properly calibrate devices. But yea were getting closer, oled continues to get brighter, I have no idea if they'll ever be able to match what were seeing now in terms of actual luminance output. But the current oleds are certainly not the final form of LED TV's.
Your viewing environment can also heavily determine how marked this difference is. If you play in a really bright environment. I'd probably recommend going the higher end LCD route. But if you play in a moderate or dimmer environment. The Oled is something special.
I like both display technologies for different reasons. The biggest problem for me is luminance and color are correlated. So in terms of producing really bright punchy colors in bright scenes and such the QLED type tv's are relatively unmatched right now. But in darker scenes OLED's are significantly better.