It appears that the concrete portion of the Devon Tower is finished. Now at the top, they are installing some sort of steel structure. This new part is following the V made at the top from the concrete pillars. The concrete only goes to 48 floors, so, I imagine that they are using the steel to finish the final two floors. The top of the tower is supposed to look like this:
On another note... the rest of the Devon complex is looking pretty good. I held the camera over the fence to get some up close pictures of the future courtyard area. You can see that most of the glass has been installed.