I can't get over the fact he basically invents a DLP-like spatial light modulator in a thought experiment 15 years before the real thing, but then immediately d

I can't get over the fact he basically invents a DLP-like spatial light modulator in a thought experiment 15 years before the real thing, but then immediately dismisses it as useless. That's nuts! Or maybe it was sarcasm that didn't make it through to the transcript?