I suppose this is one of those things you have to see to believe, because it doesn't sound too convincing on paper.
I don't like the Samsung idea - generating an interpolated image in between every real frame. I remember Philips tried this with their CRT TVs and while it looked superb a lot of the time, it could also lead to some horrible artifacts on images that were difficult to predict, like live football. The ball would often have a disturbing double image when it changed direction suddenly. If it's not using prediction, then it may be showing an image that is half a frame out of date (since it would need 2 complete frames to interpolate the inbetween one), which would be awful for gaming.
The AU idea - showing a black frame every 6th frame, it seems odd to be going back into the realm of flickering to get CRT like responses.
However, I think with both ideas though, it's how they work in pracitce that matters, and according to BeHardware, they're both much quicker than current LCDs and on a par with CRTs. So if that's the case, and we can stop worrying about response times in the future, it's a big thumbs up from me