We introduce the macroscopic point of view for questions around scalar curvature. Then we discuss the macroscopic cousins of three conjectures: 1) a conjectural bound of the simplicial volume of a Riemannian manifold in the presence of a lower scalar curvature bound, 2) the conjecture that rationally essential manifolds do not admit metrics of positive scalar curvature, 3) a conjectural bound of l²-Betti numbers of aspherical Riemannian manifolds in the presence of a lower scalar curvature bound. Group actions on Cantor spaces surprisingly play an important role in the proof. The talk is based on joint work with Sabine Braun.