One of the developers showed in the screenshots of the new blocks in MCPE 1.2. Among them we noticed the new blocks of diamond, emerald, wood, doors, and other.
As you can see, Microsoft and Mojang are not very liked the standard types of textures and for this reason they want to upgrade them. New textures blocks will help to make your home much better and prettier than with standard blocks.
We think that this is not the entire list of new blocks, because those blocks that are shown in the screenshot are the key and the most commonly used, but if you change them, you will have to change a number of other blocks that all looked harmoniously.