Beneficial to what extent, I have to ask? Boxers have a use for being able to be quick and precise on their feet and being able to keep it up for long periods while maintaining proper form, as do many athletes. I know that when I was seriously playing tennis, I had to go through the same thing, and it was meaningful for me since I like to play the net, so I have a need for small precise quick footwork.
For the average person who's probably going to buy a toy like this, they're just looking for something to keep them from becoming obese or diabetic. So the only real value of jumping rope for them is strictly getting a cardiovascular workout, which means having to maintain that state of activity without stopping.
I suppose it's possible to engineer something such that it can detect that you've jumped with correct timing and so on and warned you when you were off, which seems like a good idea, but people don't care enough. Really, they should be telling people to jump a real rope, but that's exactly what no one will bother to do. At least by saying "well, we'll make it easy on you", you have something you can sell.
"Lazy Recluse" probably describes a lot of people on this board.