Unity is not just about games, but more generally about 3D application development. And with Unity Web Player we even got a new closed source browser plugin that starts competing with Flash. I don't care about closed source games (generally I think it increases my freedom to have those compared to not having them at all - kind of like fun manacles which increase choice of action in some moments despite being used to restrict movement). But I do care about the base of software on which other software depends no longer being free and am a little worried about yet another proprietary browser plugin gaining popularity when flash is finally starting to get replaced by html.