It'd be nice but ....
Does the interface really matter? Most drives identify and give specifications when queried. I can do it now in Cygwin with tar to any of DLT 4000/7000/8000 or AIT/AIT2 over any available bus. The only thing I can't manipulate with tar is my HP DLT7000 2/28 because tar cannot manipulate a library. I hafta resort to mt and continue.
And that question is not rhetorical. I don't write low level drivers, so I honestly don't know. I DO know I can tar to virtually anything.
It would be splendiferous to be able to do a bare metal restore of a Windows box from tape.
BTW: You CAN do backups to tape now using Bacula or Amanda. They both have Windows clients, but the backup server must run on a *nix box.