I gotta say, for a while I felt like Nashville was undershooting with new development and impressive new additions to the skyline, but in the last year (even before the Amazon announcement) things seem to have turbocharged, and it's awesome. "Operations Center" sounds to me like they'll be focused on developing Amazon's ever expanding distribution system and the tech involved in that. It's like the COO of a company, and it's just as important in many respects.
I'm also musing the notion of the Music City also being a Tech City. We could conceivably expect Nashville to develop into a yet
more important center of the recording industry with the growth of "music tech" itself. The next Spotify could start here, and why shouldn't it?