I was looking at the new screenshots from jeb's twitter, and I noticed that the first one that didn't appear to have any new content may actually have an obvious secret:
Look closely at the road in the NPC village. The appearance is similar at first glance, but the texture, when closer examined, is not the same as gravel. It appears that the next update has either drastically changed the texture of gravel, or (more likely) added a new block to the game that serves as a new material for village roads. I personally think this is really cool, as I kind of hated the fugly gravel roads. Thoughts?