Well, they didn't say, specifically, but I have the impression that they're still pretty committed to the BBeB format.
My personal thought (and not trying to speak to what anyone
else should do) is that I'd be likely to want to upgrade before they drop the BBeB format. I'm also not heavily invested in ConnTexts in the first place -- the books I buy there are things I don't expect to want to re-read, so that lessens my personal concern on the matter.