Jokes aside, they did stress the "interactive" part of this as a key feature.
I can't speak for all Slashdotters, but personally, I listen to music primarily at times that I can't interact with it (beyond the mostly-passive* act of "listening to it") - In the car, at work, while mowing the lawn, etc. When I actually have the spare time and attention to interact with something, I will usually chose to interact with other humans, or actual video games, or playing with the cats, etc. I may still have music on, but I don't "interact" with it.
I would therefore have to consider this a complete non-starter. At least Neil Young's boondoggle actually did have some technical merit (while completely ignoring the reality that 99.9% of people will take "good enough" over "perfect" if it saves them a single penny). This? The "solution in need of a problem" trope gets somewhat overused, but it definitely applied here in full force.
* Yes, I do get that some music requires actively listening to it to fully appreciate it. U2 ain't that.