fast evaporation [104, 105]. These complex experimental systems all represent systems of high practical interest that the theories presented here are not (yet) able to describe. Such experiments do, however, provide a strong motivation for further work to extend the theories presented here, as well as to develop new approaches. Let us finally mention that several topics were entirely excluded from our discussion here. First, we focused on a limited range of descriptions and did, for instance, not mention lattice Boltzmann, molecular dynamics or dissipative particle dynamics approaches that may also be employed to describe fluid suspensions [106–109]. Second, we have only discussed spatially homogeneous substrates. Patterned substrates are widely used in dewetting experiments [38, 110–112]. Theoret- ical descriptions are well developed for the dewetting of films of pure non-volatile liquids on such substrates [68, 113–119]. However, in the case of volatile liquids on heterogeneous substrates, much less work has been done. A third topic that we did not touch upon are possible continuum thin film approaches to demixing dewetting suspensions. We believe it is feasible to extend the diffuse interface theories such as model-H [120] to include the influence of evaporation in dewet- ting nanoparticle suspensions. For instance, such models have already been adapted to describe demixing free surface films of polymer blends [121–123]. AJA and MJR gratefully acknowledge RCUK and EPSRC, respectively, for financial support. We acknowledge support by the European Union via the FP6 and FP7 Marie Curie schemes [Grants MRTN-CT-2004005728 (PATTERNS) and PITN-GA-2008-214919 (MULTIFLOW)]. Acknowledgments 25 [1] G. Reiter, “Dewetting of thin polymer films,” Phys. Rev. Lett. 68 , 75–78 (1992). [2] G. Reiter, “Mobility of polymers in films thinner than their unperturbed size,” Europhys. Lett. 23 , 579–584 (1993). [3] A. Sharma and G. Reiter, “Instability of thin polymer films on coated substrates: Rupture, dewetting and drop formation,” J. Colloid Interface Sci. 178 , 383–399 (1996). [4] P.-G. de Gennes, “Wetting: Statics and dynamics,” Rev. Mod. Phys. 57 , 827–863 (1985).