> I wouldn't be surprised if, in the future, we had top-quality open-source
> game engines, as well as vast libraries of art assets that may be freely
> used and tweaked in various ways, but games were generally not open
I actually wouldn't mind this as an outcome, really. For example ScummVM and the various interactive fiction interpreters all treat the games this way, and the end result is pretty great. Good quality games, no worries about lack of source for what's executing on the PC (and great quality code,) and the actual 'game' itself *can* be hacked around if your care enough (though redistribution may be an issue, but generally I think I'm OK with the original author having some control over this.)
I've never been too sure about RMS' view of different classes of works being treated differently by the copyright system, but perhaps this is an example of where it makes some sense. But yes, I remain unsure, and am certainly sway-able.