What is currently not clear is if their legal team would be OK if the Xbox (not-PC) version of Morrowind was played with OpenMW on the Xbox or Xbox 360.
This however isn't a target platform, like Android.
The FAQ should be updated:
Q: Can I use the assets from the XBox or XBox 360 version of Morrowind with OpenMW?
A: Short answer: No.
Long answer: Bethesda has asked us not to mix platforms, that means no PC Morrowind on non-PC platforms, such as the XBox. This also means no XBox Morrowind on the PC or any other non-XBox platform, except for the XBox itself or the XBox360.