If the 1000:1 ratio from LG was correct, then they could have eliminated the smearing at the cost of butchering that 5100:1 contrast ratio. But without IPS glow it would mean its still better than an IPS alternative at the same contrast ratio.I'm willing to bet the LG uses the same Panda panel as this AOC monitor http://playwares.com/index.php?mid=dpreview&page=4&document_srl=53168127. There's definitely issues on certain pixel transitions. We'll need to see how the overdrive implementation of the LG is and how higher refresh rates affect the pixel response time. Sometimes the refresh rate makes a pretty substantial difference.
It wouldn't surprise me if the maximum usable refresh rate is around 100-120 without substantial smearing.