Production-wise, it makes a lot of sense. Color consistency is better, and because they aren't trying to
build tons of arrays of different colored
LED's, you get a brighter output in a smaller package.
Programming-wise, it's a little less impressive because you're programming a
scroller instead of color-mixing, but I bet there are a lot of applications where a
scroller is just fine.
I also imagine it's at least a little
bit cheaper because it
doesn't need to have the components to smoothly dim three or more different colors of
LED's, especially because that technology is still developing, whereas
scroller technology probably doesn't have anywhere to go aside from cooling the gels and keeping the fans and motors quiet.