Bedrock Edition 1.4.0

1.4 is an upcoming update to Bedrock Edition set to be released in Q2 2018, originally set to be released as 1.3. It will add the experimental Plutonium Mode.

Additions

 * Plutonium mode

These features are included in previous versions under "Experimental Features"
 * Added drowned mobs
 * New swimming animation
 * Trident and new enchantments
 * Channeling
 * Loyalty
 * Riptide
 * Impaling
 * Stripped wood
 * Slabs and stairs for prismarine, prismarine bricks, and dark prismarine

Changes
These features are included in previous versions under "Experimental Features"
 * Items now float in water