Practice autolands, are very important to maintain pilot and or aircraft currency.
Some autolands must be carried out on a CAT 111 ILS, ie for the MD83, most aircraft systems will cope with a CAT 1 ILS. Some airports,that have approachs over the sea, will have limitations for landing, and take-off, ie Boston, Nice, Larnaca, due to ship movements. The main point of a practice autoland, is system familiarity,and SOP's. With CAT111b "0"DH, you do not reqiure to have any visual reference. For pilots based at airports that do not have CAT11, or CAT111 ILS's, but whom are required to maintain recency ie 3 approach's between an OPC "Base Check", then they will need to practice. Also if we were flying a CAT1 approach to minima ie 200ft 550m at 6am after a long night flight, then we would more than likely be carrying out a practice autoland, however airmanship would dictate, that we informed ATC first.