I just read about it, and it was pretty interesting.
It's not being developed as a "tracker," as there are multiple tracking devices for QB stuff. This is being developed to be a "trainer", which would provide instant feedback to the QB. It will actually be a pretty simple self-contained device as opposed to the trackers that are awesome, but require the link to video analysis.
If they keep the price reasonable, it could be a good idea, but the way it's being developed, it's not going to be super accurate (only 4 differentiated "directions") like some of the trackers are, so I see it way more as a get some work in type tool, rather than any kind of diagnostic type tool.