Three noteworthy things from the preview:
1. What was shown is already in better condition then the comparable elements in Gothic 3 when it shipped. Many things were still placeholders or were not shown though (ranged and melee combat, magic, voices, etc.)
2. The NPC pathfinding works correctly now.
3. The graphics in motion completely blew the author away. It looks even better than Gothic 4. The screenshots are unedited.