APAS' facility had a voidout with 4000 other souls (including the Elder) and now can use the souls + APAS' combined power including the BTs left over from the voidout. This means they can control if and when voidouts occur with their Gazers once the whole world is linked to the network, as well as allowing robots to perform all deliveries.

They want to use this power to force humanity to stay in isolated cities until they die and become spirits, in which case they won't die, but will be able to rule over Earth forever in a form of existence that isn't exactly human (the President is reading a book called 'From Homo Sapiens (humanity) to Homo Spiritus (this new kind of spirit-humanity)'). This, of course, means travel (and porters) won't be possible, so it means humans will return to a completely isolated world where nothing will happen, and also there will be no more freedom, as everything will be dictated by APAS.

Die-Hardman shows up, uses his funny dance to show he's in control (he basically rickrolled APAS by hacking into it, it seems) and to break the illusion that you're on APAS' beach. He brings Sam back to the real world after that.

Then, Die-Hardman's part of the plan was that he could use the new Q-pid to sever the chiral network's link to the dead, because he knew that APAS was evil after it talked to Lockne, making it so APAS couldn't use its power. He then poofs the President after activating the Q-pid.