I know they are pretty outdated but what about a contest for non-interactive (A8) demos (i.e. automatically moving camera and techno music), f.i. shader or vegetation demos?
"Falls das Resultat nicht einfach nur dermassen gut aussieht, sollten Sie nochmal von vorn anfangen..." - Manual
Sorry for the delayed reply; I took a long vacation. A non-interactive demo contest sounds good to me; JCL will have to approve the idea, though. Anyway, the new (programming) contest launches today.