Neat setup to service a lot of visually impaired folks and making it the default makes sense for that audience.  Looks like they have a lot of work to do to maximize that benefit but they are well on the way.  I am not qualified to test that thoroughly, but here are a few of the things I found in playing with it.
Again, I think this is a wonderful thing that will just get better with time.  But I must say that when I first downloaded and tried it, I wondered in what way it was related at all to the great KNOPPIX releases of the past.  First reaction was that it should not be KNOPPIX 6.0 but something like KNOPPIX-A 0.9.  All because I did not notice the KNOPPIX cheat on the page I downloaded from.