Lately it seems like this work has been more pre-engine research and crunch time follow-up, so I can't say I'm too worried for id. He has made it pretty clear

Lately it seems like this work has been more pre-engine research and crunch time follow-up, so I can't say I'm too worried for id. He has made it pretty clear over the last few years that there really isn't a lot for him to do there, at least on interesting stuff. Writing rendering engines has become more incremental than revolutionary and I get the feeling that, for him, stuff like mega texture was about as interesting as writing a new zip program.