they are as obsolete or not depending upon the quality of the programming material where you live - if you are lucky & have a lot of good FM programmes then you could benefit from a FM tuner; otherwise, not.
Technically, it appears that FM tuners have some life left in them as the US FCC has approved IBOC (in-band, on-channel) digital radio broadcasts. These digital radio broadcasts occur at the same FM center freq of the present radio station. So, in effect, the FM station broadcasts good, ol' FM + DAB digital radio. So, the FM tuner should have no issues picking up the FM signal like it always did.
In the UK, the word is that the switch-over to digital/DAB radio is sometime in 2015 but most of the radios in UK autos are still FM tuners. So, this is a detail that will need to be worked out so that owners of present cars do not lose radio reception in 2015.
Technically, it appears that FM tuners have some life left in them as the US FCC has approved IBOC (in-band, on-channel) digital radio broadcasts. These digital radio broadcasts occur at the same FM center freq of the present radio station. So, in effect, the FM station broadcasts good, ol' FM + DAB digital radio. So, the FM tuner should have no issues picking up the FM signal like it always did.
In the UK, the word is that the switch-over to digital/DAB radio is sometime in 2015 but most of the radios in UK autos are still FM tuners. So, this is a detail that will need to be worked out so that owners of present cars do not lose radio reception in 2015.