Basically if you look at the current slider at 100% and how fast that burns through your voting power, it sounds like they are enabling essentially turning that up to 400%. So it'd use more of your steem power, but burn through your voting % faster. This is cool for giving some posts higher payouts and making it so people with low steem power might be able to give a few pennies worth of reward. It does however, seem like a way you could consolidate power in certain posts AGAIN. So a post that benefits specific entities that could only get 100% from each person before could now potentially get 400% from all of those people. That seems like a backwards step from some of the goals of the 7 day payouts, etc. Then again with the change to the reward curve it may not matter.