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.
 

Survival Experience

• New crafting/farming mechanics
  • Wood working
  • Gem cutting
  • Alcohol Preparation in Barrels
  • Herbalism / Brewing System and Potion Effects
  • Fruit tree growing
  • Replace the 3x3 grid crafting system with something more immersive
• More immersive world
  • Immersive/Deeper combat system
  • More wildlife, flying and swimming creatures
  • Seasons and Seasonal Farming
  • Complex localized Weather patterns, various forms of rainfall/snowfall
  • Large scale world generation patterns, such as continents and regions of distinct flora and fauna
  • Improved Animal AI and improved Path finding, herding behaviors
  • Improved animal husbandry and taming
  • Richer caves (large geodes, underground plant life)
• More story
  • Story and/or Intro Mode
  • Perhaps Quests
  • More Lore

• More game play content
  • More metal ages
  • Villages, Trading, trade goods and dynamic market pricing
  • Mechanical Power that allow various forms of automation
  • Boats and Minecarts. If technically feasible: Multi-block Ships.
  • Customizable Play styles for extra hardcore or more easy going survival game play
  • Large variety of dress pieces the player can wear, some craftable, some only rarely found, player emotes. Armor system.
  • Player Progression System (Leveling,  Gear Attributes, Skills)
  • Procedural Dungeons
• More aesthetics
• More Multiplayer Features (Party system, group buffs?, improved networking, etc..)
• In-game Worldmap overhaul

Game Engine

• Virtual Reality Support
• Easy game server setup
• Easy mod installation
• Advanced Mod Manager
• Auto updater
• Highly scalable multiplayer servers
• High fidelity shader effects (water caustics, reflective surfaces, depth of field)
• 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)

Web

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