Control Warlock is an archetype that has shown up in a few different forms. Handlock was also a control deck, but it had a specific style that lent itself to a more specific naming convention. Even Warlock falls into a similar category, but is obviously limited to even cards.
The Control Warlock that is popular now uses cards like Rin, the First Disciple which puts your opponent on a clock. If they don’t silence it and it is destroyed, you can start playing the seal cards and eventually destroy their deck with Azari, the Devourer. It also has elements of Cubelock, you’ll find Voidlord as a pressure stopper, and Skull of the Man’ari that pulls demons out of your hand and onto the board.
The Boomsday Project didn’t bring a ton of new stuff to the deck, but it got Demonic Project which is one of the few ways to disrupt your opponent’s hand. This card is particularly important due to combo decks like Malygos Druid and stuff that uses Mecha’thun.