There's possibly one reason why carriers (and probably vendors) haven't much interest in FM radios which the article and (if I don't overlooked) no comment mention: digital dividend. At least here in Germany carriers awaiting the moment when FM broadcast is finally declared dead and their frequencies become free for sale. The VHF band between 87.5 to 108.0 MHz is of big interest especially for rural areas.
Great point, and I would imagine that spectrum / bands will be the next big "war" like patents have been recently for large entities. Lightsquared really tested the waters - and failed due to simple engineering and existing neighbors overlap (aka "No, you can't build a dirt bike track in the middle of a suburban neighborhood and next door to an Elementary school"). Getting access and legal approval will be quite a su…
"Digitale Dividende I": six 5 Mhz wide bands (always in "pairs") each between 570.849 and 627.317 million €. Winners: O2, Telekom, Vodafone. (source: https://de.wikipedia.org/wiki/Digitale_Dividende#Frequenzver...)
"Digitale Dividende II": thirty-one 5 Mhz wide bands (some of them "paired") each between 39.011 and 255.967 million €. Winners: Telekom, Vodafone, Telefónica (formerly O2). (source: http://www.bundesnetzagentur.de/cln_1432/DE/Sachgebiete/Tele...)
Further I know of some radio stations (especially community radios) which refuse to accept special offers from broadcast carriers for digital radio (DAB+ and DVB-T(2)) broadcasting because of the fear that this could be used as another argument against them having an own analog FM frequency.