A friend (slab-player, R&B) was in one of the bands that Bose used during development. He reports that it really does everything it's advertised as doing.
On the bose site, there is a web-forum. An hour spent there will answer most of the obvious questions. I didn't come across any posts on that forum that related directly to double bass, or small ensemble acoustic jazz, which topics would probably most interest many of our TB DBers, but distilling and synthesizing from what is there, I think this must be "the answer".
I suspect, though, that ideally it really needs to be the group's answer, not just for one player. In other words, many advantages of this approach would be lost if just the bass player was using one of these while the rest of the group were still using conventional amplification/PA/monitoring.
Also, although Marcus was clearly impressed with a quartet all through one unit, from reading Bose's white paper and various posts on the forum, it seems that two or more would be another order of magnitude better. Having some physical separation of the sound sources of different voices, and having some degree of correlation between location of each player with his own sound source seems to help immensely in audience intelligibility, not to mention helping musicians' hearing of one another.
Anyway, this really looks like it has the potential to make sound-reinforced ensemble playing MUCH more pleasant and effective, in almost any venue.