For a typical HPC cluster, there is a shared filesystem with exactly the same file structures across the cluster over a high bandwidth network, which basically replaces "a clever use of fuse/sshfs and chroots" with something far better. OP's project is clearly useless in HPC setting.
On the other hand, OP's project is exactly an linux/posix version of the same as what Plan 9 was designed to do and has been doing.
On the other hand, OP's project is exactly an linux/posix version of the same as what Plan 9 was designed to do and has been doing.