I hardly ever use miniatures, but if I did I would be quite tempted by Urban Apocalypse terrain for modern games. The World Of Darkness would suit the run-down city it builds, as well as the intended post-apocalypse and urban combat games. And the firehouse would be great for Ghostbusters. (Edit: now with a Shanty Town option for Sicario adventures. Or something else. But now I want to do a Sicario adventure.)
But the current state of the art is for dungeons - Dragonlock snap-together 3D printed pieces. Just being reliably snap-together would be a big deal, but 3D printed!