As a dual Licensee, I can only say that the Technician License opens up a whole world of interesting possibilities to experiment with Linking, Digital Communications and the like as long as you are operating above 50 mHz. If that is not something interesting or compelling, no problem. Some may have equipment that can be reconfigured to support HAM+GMRS+MURS, especially those that are new to GMRS and bought Radio On A Chip based hardware.
As an aside, I have been a HAM since 1988, and added a GMRS License to communicate with family and traveling companions only recently.