At The Minecraft Pocket Edition panel at Minecon 2012, it was stated that future plans include trying to have a proper use for cameras, perhaps an easier way to take screenshots and share them with others, they think it's going to come in 0.7.0 but they are not sure yet.
Jbernhardsson tweeted that the changes to the sky in 0.6.0 were only the first iteration, and he has plans to implement more features like sunrise/sunset and stars (to bring it closer to the PC version).