As promised, Grinding Gear Games will be adding two new Incursion rooms in Path of Exile's content update 3.3.1, where "room" accounts for all the past, present and future variants of rooms. The update is scheduled for 03 July 2018.
The rooms are called Torment Cells and Strongbox Chamber, which act just like any other room and can be upgraded as such. Speaking of upgrades, Torment Cells upgrade to Torture Cages and Sadist's Den, while Strongbox Chamber turns to Hall of Locks and Court of Sealed Death.
As far as gameplay goes, it's the same deal - find the boss and feed him a knuckle mana sandwich, albeit it sounds much easier than it is in practice. Loot as necessary. Also, don't confuse the video with the new rooms, it's just an updated Demonic Shield charge.
Torment Cells are riddled with tormented spirits, waiting on tormentable bodies to posses. Tzamoto, Architect of Torment, the delightful chap from the photo below, is one of Torment Cells denizens and the dev enquires whether you "dare allow him to become possessed?"
Tier I of Torment Cells rooms has three tormented spirits, with two additional ones for each subsequent tier. Note that if you need help taking care of 'Complete these Encounters I', Tormented Embezzlers can be found in the Sadist's Den.
The Strongbox Chamber is guarded by architect of concealment Zantipi and it seems to be heavily favoured by the Path of Exile community, rightfully so. The room packs "just about every type of strongbox" around, including the cartographer's and "various unique" strongboxes.
Getting the best loot of course means you should upgrade the room at any given opportunity and the room's tier will dictate how many many of them are there to be found. Tier I, II and III contain two, for and six strongboxes, respectively.
Grinding Gear Games
Incursion has proven to be a major hit for Grinding Gear and Path of Exile, boosting the game's Steam numbers by quite a margin. The game's available on Xbox One so the numbers are even better than GabeN suggests, but they're a proper indicator that the dev is pulling all the right moves. More please.
Grinding Gear Games