Suzanne Ginsburg discusses options for developing smartphone apps across different platforms. She outlines three main approaches: 1) developing for a single "native" platform as a "One Trick Pony"; 2) developing for two to three flagship platforms using the "O.K. Corral" approach; and 3) using hybrid app development tools to create "Trojan Horse" apps that are web-based but have native capabilities. She provides examples and considerations for each approach, addressing issues like hardware access needs, monetization strategies, and balancing customization with cross-platform development.