Oh?
How do you deduce this?
Aren't the license-free wireless IP routers MORE of a threat at present then UWB is? (Hint: Imagine a VoIP phone that worked un-licensed through a nearby wireless router.)
(You also ignore the fact that it is that large mass of infrastructure enconpassing switching and backhaul to an MTSO and interconnection to the PSTN that accounts for the utility of cellular in that you have the ability to call anyone in the world who has a phone ...)