I think you're partly right and partly wrong. You can already create games on OS X using open source toolkits. Blender would be one part of a games developer's toolkit that has progressed quite far. If you're thinking about seeing a games kit in iLife, I think you'll be waiting a long time. The essence of iLife is that it's *my media*. It's a picture of my aunt, video of my uncle, etc. GarageBand would be the odd one out in the ensemble. But I'm sure you'll admit that games development is an order of magnitude more complex from the point of view of the average Mac user than is making music or recording podcasts. If you want to let users create interactive content, something like Dashcode is way more promising.