There seems to be a bigger push into GBAS these days. Frankfurt published GBAS approaches to all its landing runways last fall down to CAT I minima after a several year long normal operation in EDDW worked out quite fine. MUC will follow next apparently, Malaga is finally operational as well after years and years of trials.
Currently there is no advantage with GBAS as it just offers CAT I minima and therefore a normal CAT IIIb ILS has to be there anyway, in the future it could of course make those ILS installations obsolete, not to mention that it is easy to offer different glideslope angles and approaches to all runways with just one installation.
And although my outfit was the first certified GBAS airline in europe we will lose that capability soon with the phase out of our 737s. Boeing gives away the GBAS capability for free, retrofit on the A320 costs around 250k per airframe which makes it a non-issue, as it isn't needed at the moment anyway.