These are some of the features that we would like to implement. However, more often than not we will add new, previously unplanned, content to the game at a higher priority, and some features we implement in their basic forms and continuously revisit/tweak them as we go. 

Disclaimer: We do not make any promises when or how many of these features will be implemented. We are very eager to see these features in-game ourselves though. Also completing the entire list in its full glory would probably take us over 10 years of game development.
 

Survival Experience

• New crafting and farming mechanics
  • Replace the 3x3 grid crafting system with something more immersive
  • Woodworking
  • Gemcutting
  • Fruit trees and Alcohol Brewing
  • Herbalism / Brewing System and Potion Effects
  • Fishing
  • Mushroom farming
  • Cloth weaving
  • More ways of preparing food
• Improved animals and animal husbandry
  • Multi-generational animal domestication
  • Animal riding
  • Improved animal behaviors (act in herds, animal<->animal interactions, improved path finding, animal personality, hare burrowing mechanics, hen boxes)
  • Greater range of productive livestock, adapted to specific climate areas
  • Birds and schools of fish
  • Insects and Critters
  • More challenging wildlife
  • The ability to pet tamed animals
• Improved world generation
  • Large scale world generation patterns, such as continents
  • Regions of distinct flora and fauna
  • Richer caves
  • Look on the the possibilities of river generation
  • Oceans and ocean life
  • Procedural dungeons
• More Lore
  • Add story rich game content
  • About a dozen main story events
  • More talkative villagers/traders
• More and Improved game play content
  • Improved combat
  • Improved trading and trade routes
  • More ways to mechanize work with mechanical power
  • Water wheels, improved liquid mechanics
  • Boats and Minecarts. If technically feasible: Multi-block Ships
  • Some sort of character progression system
  • A number of high-stakes boss fights
  • End-game content: Steam
• Revisit and revise existing mechanics

Game Engine

• Easy game server setup (WIP)
• Easy mod installation
• Advanced Mod Manager
• Auto updater
• Highly scalable multiplayer servers
• Improved graphics (reflections, refractions, water caustics, optional depth of field, nicer clouds, etc.)
• Download music in the background (90% reduced installer file size)
• Improved performance for greater view distances (cave culler, greedy meshing, LoD for very distant terrain, variance shadow mapping)
• In the far future - Virtual Reality Support

Web

• Official mod hub that integrates into the game and auto-mod download when connecting to a server (WIP)
• Improved public server listing