WSA beta group thread:
https://groups.google.com/a/unity3d.com/forum/#!topic/unity-windows-store-beta/f2GAucOSGOs

In player settings, when building to Universal Apps, "Resolution and Presentation" settings are missing, compared to WP platform's settings.

Repro steps:
1. open editor;
2. go to build settings -> player settings;
3. click on WP platform and observe "Resolution and Presentation" tab;
4. click on WSA platform and observe "Resolution and Presentation" tab;