Not anytime soon. They probably just licensed their freqs for digital future use. I would imagine someday that everyone in Colorado will be "digital" in some way. Boulder County agencies as well as Larimer are pretty much the only ones left that are trying to stay away from the push to the Colorado DTRS system. I would bet that you won't see them going digital anytime soon, even if it is on VHF.
Well like I said, someday, they will probably be digital (provoice, APCO-25 whatever). Digital will most likely become the standard with "everything" soon enough.