Cross-environment rendering and user interaction support provide a seamless computing experience in a multi-operating system computing environment. The multi-operating system computing environment may include a mobile operating system and a desktop operating system running concurrently and independently on a mobile computing device. Real-time or instant display of an application running in the mobile operating system within an environment of the desktop operating system is provided by rendering application graphics for the application within the desktop operating system. A console application of the desktop operating system may access surface information for the application from shared memory and render the application within a console window of the computing environment associated with the desktop operating system. The mobile computing device may be a smartphone running the Android mobile operating system and a full desktop Linux distribution on a modified Android kernel.