Unless they add site to areas like Trona and Red Mountain they will still need them. I know in Ridgecrest I can get D-Fire-4 and in some parts of town D-Fire-3. Once you get on the 14 you can even get D-Fire-2 South of Jawbone.
The new system is the 700/800 p25 system that is in development. Was not sure if they would plan for intellirepeaters or standalones like the "D-System" One thing I like about the standalone repeaters is you and monitor a larger area because of simulcasting.