The Dominion makes its presence known, and hoo-hah is the Alpha Quadrant screwed. The DS9 Rewatch gets its ass kicked by "The Jem'Hadar."
While the episode in general establishes a new status quo with a new and very nasty bad guy, the specifics are not followed up on hardly at all. Talak’talan says that any travel through “the anomaly” will be viewed as an invasion of Dominion territory, yet ships will continue to bugger through the wormhole for the next five seasons without any specific response. We meet no other telekinetic Vorta, we see no more soooooper transporting over long distances, we see no more walking through force fields.
Having said that, it’s still a very strong episode, mostly for the bits with the Siskos and the Ferengi (together, they fight crime!). Quark’s speech on how the Ferengi are better than humans is a masterpiece (with the delightful coda, “Now if you’ll excuse me, I have a lock to pick”). Just in general, this episode does a superb job of establishing that the Ferengi are a complex species that can’t just be pigeonholed into “yucky capitalists.” I adore the notion that they don’t have anything like the history of warfare and violence that humans (and other species in Trek) have.