Ok, so I'd like to point out a few things.
First off, I'm glad to see how accepting people are of the fact that these runs were TAS. I think most people have handled it very well, especially Casual himself. This is exactly how Raiin should have handled his runs: admitted the truth and then done what he could to right his wrongs.
Second, this is really a revolution in jumping. There are so many uses for Casual's tool that can be used for good.
1. Jump Map Showcases
No longer will you have to spend hours trying to get your cuts to look good. With this tool, you can put together a flawless run of a map, improving showcases and videos of jump maps. Since the tool will make it clear that it is a TAS run, people will be unable to pass off runs as speedruns done legitimately.
2. Theoretical perfect runs
Everything Casual did in all of his runs was possible in normal TF2. He just didn't do them all in one run. This opens up new possibilities for non-TAS perfect runs. Someone could get a perfect or near-perfect run of a map and use it as a standard to aim for without using the tool since all the runs are possible without assistance. As far as I know, nobody has flawless jump_soar, let alone gotten a perfect run of it. With Casual's tool, someone could get a TAS run of the map and then use it a benchmark for their normal runs and something to aim for.
3. TAS speedrunning
Maps could be created with TAS in mind, leaving room open for ridiculous strats that would otherwise be near-impossible. And since everyone would have the tool, everyone would be on even ground and it would come down to creativity, not consistency and execution. What always amazed me the most with Casual's runs was the creativity of the strats, not the execution of the strats. People would never have tried some of the things he did in his runs because they were too risky to do during a good run. However, since everyone could use the tool in a TAS run, new possibilities would be open and people would be limited only by their creativity and the game itself, not necessarily how consistently then can grind out a jump.
There are even more possibilities than the ones listed here, such as co-op TAS running in segments and other things that would have previously been impossible, but I'll save those for later. For now, I'd just like to thank Casual for revolutionizing jumping.