So, here is what's going to happen.

In NXT, forgers decide what chain to forge on.

NXT is all for decentralization.

CfB is against a rollback, he said, but he sees not giving a choice to the community as a centralized decision on his part.

That's why he's going to put a modified release for download, which rolls back the chain.

If enough forgers download that release and forge with it and their chain is longer, then that chain wins and the hack is rolled back.

If enough forgers stay on the old chain and keep it the longest, then the hack is not rolled back.

That's how decentralization works in the PoS world.

The equivalent in PoW would be 51% of the miners mining on the longest chain, it's same in PoS.

Let's see how this drama unfolds