Custom Incredulity: Starcraft II's Map Cleverness

So Blizzard's Starcraft: Ghost action game might not have seen the light of day, but it seems you're going to be able to build your own third-person shooter within Starcraft II anyway. What? Yes, the editor is super-flexible, and is even going to support mouselook. Building a third-person shooter inside the RTS editing suite is going to be a possibility, as Blizzard demonstrated with their proof of concept at BlizzCon. Video of it in action below. The scrolling shooter is also acceptable. Cheers to sub edii for pointing out this link.