Why is there no mobile app
For now the wanted to focus on the main video viewing platform for medium to long form video content. Which still is the laptop/desktop. The experience that we want to deliver to our viewers is one of speed and simplicity. When we have more validation of our initial idea we will definitely consider developing a mobile app.
Please also consider a Windows Store app ("metro" app) for the Windows desktop then :)
The interface feels familiar and easy to use.
However I also unconsciously expect it to act as a native Windows Store app (e.g. when using touch I want to swipe videos, or I want to snap the app to an edge to view 2 apps side by side)