No access to the Blu-ray drive to start the disc or even an attached storage drive.
Network support is limited to only NFS:// shares. As of this writing there's limited access to only what's part of your Video and Music folders.
Some parts are not even finished yet and our developers are still working on getting it up to the regular standard. Due to the nature of how UWP works our hands are tied in some areas. What you should really understand and keep remembering is that it is still in early stages of development and has very rough edges, might not be as stable as the regular version and may even be missing some functions. It's a very early look at the app, and while the fit and finish looks pretty great (and on par with the current stable version on Windows 10), the developers have been quick to point out where the current limitations are.
