ACARS is the next best thing to TCAS. With the D-ATIS function pilots can find out the biggest secret in aviation...runway in use. When problems occur, a dialogue between the engineers or ops can take place without the SELCAL going off every 5 mins. FMS VNAV/LNAV is great in theory and a non-precision approach could be carried out in LNAV/VNAV if there were no map-shift, which is taken out on an ILS when the localiser is captured. Profile descents should become a reality, but tell that to the USA where ATC will cock you around throughout the approach. Coordination between ATC and pilots could make all this happen BUT....