Dwarven Forge Kickstarter #5 forward look

Sometime in May, perhaps, Dwarven Forge will launch their 5th Kickstarter project which takes things back to the dungeon. Here are some preview pictures of prototypes for what is likely a big part of the new project.

The pillar and arch design provides the basic set a sufficiently different look and helps vary the appearance of the dungeon environment.

Here's what really grabbed my attention, the ability to build decent sized circular rooms using some freestanding curved walls and other pieces.

Additionally DF are working on alternative basic corners, diagonal walls, broken pillars, etc.

Does anyone recall if the snake design floor pieces below are old or new?

I currently have no available budget to speak of, but I would certainly like to add to my existing collection of DF terrain given the opportunity.