It is pretty good. Even better is their idea of reserving the space needed for a path to function when using the terrain tool to put soil above it.
One thing I have not noticed though is how paths are going to work on inclined terrain.
It's more of a cool video than a video where you can see how the game works.The lamps are actually floating when you first see them, it looks to me like they built the path and added lamps and then did some dev wizardry to hide/redraw the path for the purposes of the video.
It seems so amazing, every little pixel makes me happy
One thing: NO STAIRS??