Some Thoughts:
Although the above the link is the only the announcement I can only imagine what DR will implement to date. Off the top of my mind, Offset and Walkpath Editors top the list. For all that is planned a whole suite could be in order. What I'm most thrilled about is how well these can streamline content making. Nothing is better than syncing up what you have coded aside the art and sprites you've made up. While I mod, I often mark or try to see where my offsets will be. Other times scraps of walking arcs riddle my page to figure out how the get an aesthetic but functional gait.
The above thought also brings up something else: will these be a replacement for the editors we have, running in place of them in-menu? This move, should it be, is a grand one. Take in point the Actor Editor, it shows and test the basic functions at command yet no way to test the actor under gravity nor apply forces to it in testing. From here, I believe most modders would just use the Tutorial Bunker as a benchmark for new content.
Like I said who knows, yet. We could have drop-in support for our sprites. Or script and assemble actors/scenes in the same program. And the life of me, we probably getting a zoom feature or measurement tools. I'd love to know my actor's weight and impulses on the fly. (Closest thing to that was CC48's Scanners). The program(s) altogether could be a proverbial raster and vector program for CC. Don't get me started on Campaign Editing
Above it all though, CC is getting a rather needed upgrade in a very crucial area. I have to admit this makes the game a more viable sandbox and interchanging platform.