9 new crafting recipes
Clay was changed
Glass was fixed
Clouds were fixed
You can see the world map
Creative mode with flying, unlimited resources, and unlimited item selection
SPRINTING
Combat changed immensely
Three new mobs
Zombies drop rotten flesh now
Underground Ravines
Strongholds and Villages
Abandoned Mine Shafts
Mushroom Biome
Rivers flow through biomes
Ocean Biomes
Swamp Biomes
Taiga and Tundra Biomes removed
Farming changed
Food and Hunger system
Arrows get stuck on mobs when they hit
Vine blocks
Improved Shears
Redesigned HUD
New Particle Effects
Bubbles underwater
Fog gets thicker and darker the more underground you go
Void is now black and gives off particles
Multiplayer Server List
Improved Server Join Screen
Player Lists
Mods can now enter creative mode on SMP servers
Easier changing of the max level height
Terrain Generation code fixed and made tidier
Shift-Clicking items will craft the maximum possible amount of what you are trying to craft with the limit at 64 and will directly put it in your inventory without the need to drag it there. (e.g. You have 16 coal above 16 sticks and you shift click the torches, a stack of torches (64) will appear in your bottom usage bar)
Bedrock only spawns on the lowest 3 layers instead of 5.
Improved chest model with a 3D lock and an open state/animation.
"TDLR" You're wrong, deal with it