Fascinating biology occurs at epithelial interfaces, whether between organism and environment or within body compartments, and many diseases inflicting huge personal and societal burdens result from dysfunction of epithelial systems, e.g., carcinomas. Epithelial cell cultures have been an integral and crucial part of the biomedical research enterprise, adding unique capabilities and enabling mechanistic approaches. In the past decade there have been many research advances, such as directed differentiation of embryonic stem cells and induced pluripotent stem cells, robotic high throughput...