@vilas, im sure if the correct documentation is provided and the authority agrees that even on our airbus fleet we could do away with the need to monitor the underlying navaid. Currently that is not the case. In general i was kinda surprised upon switching from boeing to airbus how oldfashioned its avionics and especially its PFD and ND are. But that is a discussion for another thread.
@Kefuddle, dunno, with the big allowable nav aid error for conventional nav aids compared to constant monitoring of your onboard navigation performance (which is not only based on GPS), i'd rather take the latter. Even better would be GLS of course, cheap to have and serving precision approaches to all runways in the vicinity with one installation.