I was an early Landmark player and helped figure out some of the original voxelmancy techniques. When I saw DU was using dual contouring and hermit data .. well .. I had some flashbacks of Landmark.
The thing is .. Landmark stopped being fun for me once I learned what I could do within the engine if only I wanted to spend a crazy amount of time using messy workarounds. It is hard to tell based on the Alpha video I watched if DU's voxel engine and tools will produce the same type of environment we had in Landmark. If it does get to that point, I hope they give us (or let us create) better tools so you don't have to do things like making voxel boards.