Functionality of collecting signatures was present for some time already. But now it is extended with possibility to define what will happen if the whole process with finish with acceptance of rejection.
So from now on you can not only define who should sign the case (or part of it) and ask them one by one or at the same time.
So now you can define processes of collecting signatures and define who will take care of it after signatures are collected. You can also define more sofisticated scenarios if you use rules, because you can define automatic rule which will fire on certain stage. So you have lots of options :)