My guess is GMRS will become unregulated like CB did many years ago, then the radio makers will decide on a new frequency band and come up with a new name and get everyone to buy those instead of the frm.gmrs/cb.
The main problem I have is the frs/gmrs radios have taken over the name walkie talkie so now when you search for a walkie talkie thats all the hits you get. But I remember when walkie talkie was a handheld CB so I still use that term out of habbit when I serach for CB stuff and have a hard time findng anything. Some of the smarter ebay sellers are the worst, they will put a description like "frs radio not gmrs or cb" so they get a hit no matter what you search for.
The funny thing is with CB channels other than 19 are all dead air anymore so there are still 38 channels for use when you drop off 9 and 19 so there really isn't any need to buy FRS and GMRS unless you just like spending money.