[UPDATE]: More details on the Puzzle Maker – apparently, you will be able to export Puzzle Maker maps to the Hammer Editor for extra detail and design. In addition, Hammer-made maps can be uploaded to the Workshop. You won’t be able to import Hammer maps to the Puzzle Maker, but hopefully, much like co-op support, this will be added to the PTI following its release.]
What would a Portal-related announcement be without a wacky, non-canon trailer short from Cave Johnson providing some manner of insane backstory to whatever is vehind the announcement? It’d be… a trailer-less announcement, that’s what! Thankfully, that’s never a possibility when you’re dealing with Aperture.