I believe the plan is to allow the creation of exporters to any platform.
From the FAQ:
[quote:3ityeret]Q: What are these exporters I'm hearing about?
A: Exporters compile projects into various formats for use on different platforms. This time they are modular and can be made by anyone, just like a plugin.
Q: Why is HTML5 the main exporter?
A: The HTML5 exporter is being made first mainly because it is multiplatform. Having immediate multiplatform support is meant to attract as many users to C2 as early as possible.
Q: Will there be an EXE exporter?
A: Yes, eventually. Either the Scirra devs will make one, or a third-party will make one. With the modular exporter system, it could be both. By the time C2 can be used for much, there will probably be an EXE exporter.