The Doctor asked the same question in the finale, but the mind staggers about how in the manner that their final victory is achieved that they are the last life forms like int he timeline averted in genesis of the Daleks or they've enslaved the rest of the universe like in the audio adventures...
No one to hate? No one to kill? What the hell are they going to do?
No one to hate? No one to kill? What the hell are they going to do?