That's not what is being displayed in that video. I'm not criticizing the tech or the advancements in the tech, I'm criticizing the time spent programming it for this dance video. The engineers, not the machine. Again, there's better demonstrations of its capabilities than spending tons of time choreographing a dance off.
It's a demo. Your basic project "Dog and Pony show" that goes on with EVERY high-tech project so that the dollars to continue the project keep flowing. Perhaps doubling as a sort of "progress report" to those who have already pumped in dollars that have already been spent. Sure - it could be your standard 3000 page report with spreadsheets and flowcharts and what-not, but how impressive would that have been compared to this? Can you imagine how that'd be likely to go over? "Yeah, great - you've spent 15 years and as many million dollars, and all you've got to show for it is this three-ring binder full of paper and ink?" I see only one outcome: Project canceled.
This video at least shows definite, concrete, easily seen, easily measured progress towards the final goal, in a way that anybody who isn't a complete and total "thud" can easily see, understand, and appreciate. Even if that goal is nothing more than getting the darned things to dance - never mind that this is damn-near miraculous when stacked up against the state of the art when the project got started.
These things are semi-autonomous, able to outperform MANY alternatives at many tasks, under conditions that no human could handle, at speeds humans aren't capable of on their best day, with strength that, while fully able to rip chunks out of a concrete wall, is controlled well enough that they can pick up and juggle eggs and light bulbs, and at the end of the demo, still have uncracked eggs, and light bulbs that work.
Which doesn't even begin to address the fact that your supposed "tons of time" isn't nearly as much as you're probably thinking. Back in the day, yes - it did indeed take hours, if not days or even weeks, of time to program a 3-axis machine to do a motion that took a whole 4-5 seconds to perform. With the stuff they've been doing at Boston Dynamics, I'm betting that the "coding" for this looked more along the lines of "Move left foot from start to position A while moving right arm from start to position B", and the 'bots "just do it" - none of the "break it down into a bazillion steps" malarkey it used to take to make something happen "the old way".
*THAT* capability is truly what's on display here, whether you realize it or not.
"No use"? A waste of time? I think not.