Guys, lately there has been very little news about future versions —
Minecraft PE 0.15.0. One of the developers, namely — Daniel Wustenhoff shared on their Twitter page a stunning animation.
Daniel Wustenhoff posted on his Twitter page in the GIF image which clearly shows how sticky the piston interacts with the chest. Now, thanks to sticky pistons you can create sliding boxes, which will be to work with Redstone-mechanisms.
Drawers in chests you can hide somewhere in the walls or in the floor. The innovation of this feature in Pocket Edition will give many new ideas: "how to hide the chest". It may take the whole mechanism.
For example: you can under your house to create a mechanism that will push the floor and simultaneously push up the chest. This is one of the ideas as possible under a small house to hide a chest with precious metals and things.