I need an extremely clear answer. Since I've heard different things from different sources I need the answers to the following questions.
Short answer: what dinozetc said.
Long answer: You read different answers because blizzard WAS going to reset honor and marks, but then they noticed no one was excited with the idea and changed their minds. Arena points, however are still going to be reset as soon as you hit 71 (if you stay at 70 you get to keep your points, though there will be no rated matches for you anymore). So in the end, we are keeping honor and honor marks, but losing our arena points.