Looks like the photos are out of the tire I designed for Maxxis. Its supposed to be a replacement for the High Roller to give it better braking and a little better bite on turn in. The knob height will be increased for production and will make it much better in soft conditions. So far the tests are good!
http://www.pinkbike.com/news/Prototype-Maxxis-Downill-Tire-Taipei-Cycle-Show-2011.html