You can do that today, almost.
If I had GPSS enabled (4 wires to connect, and a simple AP config change) I could fly a whole route hands-off. All the way to the end of the ILS glideslope (well below 100ft, I can tell you). No vertical nav of course; that implies an auto throttle system.
Autoland however requires a radar altimeter, and some software
Not to mention an auto throttle...