How I understand it:
- Boss dies - we all roll (do we have to actually roll or is it automatic now?)
- Game selects the top 'n' rolls and declares them winners.
- The game then checks that bosses entire loot table, picks out all the items they could use and then randomly gives one of them to each of the winners. (is it random, or is it smart? will it give duplicate items, will it favour main spec or is it just random?)
- If there's no useable loot on that boss, the winners instead get gold
This is the best I can comprehend it. Some people are suggesting that everyone rolls and the system will decide if they win or lose, like say "everyone who rolls greater than 80 wins" or some such, leading to a possibility that everyone wins something, or nobody wins anything and every other possibility in between. I don't think this is correct though.
Now people are also saying this wont fix the problem of ninjaing. when in fact it does. The boss wont "drop loot" anymore, you wont see items upfront so nobody will ninja "your sword" because its not decided what items people get untill after they have already been declared winners.