The Fuji film is the same format as Polaroid pack film and operates in the same way. Unfortunately they aren't offering a sheet film format that would fit the 545 type holders that were more popular among fine art and commercial photographers, but the biggest demand for instant film has long been for passport and ID photos, and those cameras use pack film.
Each exposure has a negative side, a positive receiving sheet, and a set of chemical pods. When you pull the film the rollers, the chemical pods break and a chemical gel that includes everything necessary for processing the negative in one thickened mixture is spread evenly between the sheets, the neg side develops and the image diffuses to the positive sheet. That it works, and in color no less, is incredible.