Dapp ideas for LISK

[ttookk]

I am tired of all the yelling and screaming in the main thread, so I thought, i'd open this thread to discuss Dapp ideas for Lisk. I don't necessarily mean what you can do, but what you think might be an great idea, so basically fantasy time

Here is one of mine, a browsergamelike including Lisks features in it's gameplay:
https://docs.google.com/document/d/1ML_nI88q3c9N9oVJjyaLeBM4RoDA6LDtgxPskmTFgB8/edit

What's your ideas?