I have a Samsung LED tv, that is 120hz. (UE40D5520)
While watching films and sports, I have awesome motion blur that makes it unwatchable most of the time.
I have seen a new TV I would like to purchase.
An LG Cinema 3D 42 inch led. It says it is 100hz TRUMOTION, with 400hz MIC?
Does that mean it will be worse motion blur?
Sounds like you have the Samsung equivalent of motion interpolation turned on. The LG TruMotion is their version of motion interpolation which artificially adds an extra frame to smooth out the motion but gives it that SOE (Soap Opera Effect) at times depending on how you tweak it. A 120Hz set plays each frame twice (60Hz x 2) so motion should be smoother. I turn off motion interpolation when I watch movies and only sometimes use it for network tv or sports.