OpenMW, the free open source engine, has announced implemention of the compressed BSA format to support the games Oblivion, Fallout 3, Fallout: New Vegas and Skyrim. The modern BSA files can be loaded, but much work remains and we are still a long way off from being able to play through these games fully.
It is incredible that so much progress had been made on this free open source engine and the possibilities are exciting. The engine, which was originally designed to re-implement and extend the 2002 Gamebryo engine for The Elder Scrolls III: Morrowind, has now been ported to Android, to VR, and it even has a multiplayer fork called TES3MP. The implications of support for modern Gamebryo engine games are very interesting and could eventually see new VR implementations with crossplatform support. Perhaps one day support could extend to Creation Engine games like Fallout 4 and Fallout 76 and have them run on the macOS and Linux operating systems.
Until more progress is made on development, you can check out some of the very interesting videos creating by developer cc9cii showing off the new BSA support:
Fallout: New Vegas map running in OpenMW
Skyrim map running in OpenMW
Fallout 3 map running in OpenMW