Note that there are other implementations, these are just the blocks and items.
Sponges got a new texture and there are a good amount of new end blocks
New command blocks! Also, original command block re-textured and has flashing lights
Skeletons got a new model
New kinds of arrows using various potion effects
New potion type: Lingering
Berries from a tree in the end
Dual wielding and Dragon Head
Shields
Sponges got a new texture and there are a good amount of new end blocks
New command blocks! Also, original command block re-textured and has flashing lights
Skeletons got a new model
New kinds of arrows using various potion effects
New potion type: Lingering
Berries from a tree in the end
Dual wielding and Dragon Head
Shields
New fruit: beetroot. Already existed in pocket edition, but was brought to the pc/mac!