The reason is what I was told is the phone companies owns the rites of the 2.4 band and when they start to complain it could be a major issue with the AMA and the FCC.
Is your thesis that 2.4 will be cleared for cell phones? Does this include cleared of wifi? If so, I can't imagine how it could possible be true. On the other hand, if the FCC has a desire to slow the propagation of devices by more narrowly defining use in this currently non-licensed spectrum that could be plausible. I can't for a moment imagine how existing devices would be precluded from operating given the sheer quantity (of baby monitors etc). Regardless, wouldn't there be a publication of proposed rule making and request for comment?
The 2.4GHz radio's that we use in this hobby will be a thing in the past soon enough I was told.
There is also unlicensed space at 5ghz, is that what you are talking about? Are you suggesting a prohibition of 2.4 for RC (and if so way in the future or soon)?