The main features are of course
- Home, which is your twitter feed,
- Connect, which shows your mentions, retweeted and favorited tweets,
- Discover, which helps you discover trending and interesting topics and of course
- Me, which is all about you, including your direct messages, statistics and photos.
Of course, not only did they create a Moder UI themed app, they also included some minimum requirements, I would expect from a Windows Store app: push notifications for all kinds of tweets, new followers and direct messages as well as being able to use the Windows 8 search to search on twitter and of course, sharing content from wherever you are – that's how I already shared the app-link on twitter. They did not forget about the snap view either, so while surfing /dev/alopix, you can also check your twitter feeds ;)
Unfortunately, the app currently only supports a single user account, which for most people should be ok, but I hope they will add that feature in a future release. Otherwise there is nothing more to tell you but where to find it: the Windows Store of course!