I downloaded and installed it, but really could find no changes, so it must be bug-fixes or language updates.

The release notes appear to be the same as for the original release.

I don't think there will be any interface changes. Sony seems to agree with Microsoft that the only growth part of computing is in smartphones and touch pads/screens, and since they both missed the boat in each of these areas, they now need to work overtime to fit into the new business model.

It looks like we have to be satisfied with version 12 or purchase a new 38 inch touch screen.