I do expect to see CAT III ILS around for quite a long time. Regulatory progress is extremely slow. We have done GLS autoland trials five years ago with excellent results, however there is no apparent movement to allow lower than CAT I minima in europe. Even though we have been certified for operational use of GLS since 2009 there was only one airport in my country with an operational GLS until a few months ago, when FRA introduced the second GLS station and GLS approaches to all landing runways.
Getting approval was helped by the fact that boeing essentialy offered us GLS free of charge on all 737s since 2006. Sadly a retrofit on our A320 fleet would cost around a quarter million per aircraft which makes it economically unfeasible. Since we are now phasing out the 737 in favor of A320s we will lose our GLS capability. If we (or our on this site unmentionable major shareholder) orders new Airbii it might be included.