The occurrences of runway incursions and weather dependent airport throughput have led to the development of the Advanced Surface Movement Guidance and Control Systems (A-SMGCS) concept. A-SMGCS will support air traffic controllers (ATCOs) as well as pilots and vehicle drivers—when fully implemented—in the functions of surveillance, control, routing (planning) and guidance in a holistic way. A stepwise implementation approach allows the partial application of this concept today, giving early benefits to airports, Air Navigation Service Providers and airlines, while the higher level functions are still under research and development. ICAO has published the concept in its document 9830, describing operational, functional and performance requirements. An assessment of the ASMGCS benefits is a key factor in deciding about the implementation of such systems. Results concerning the benefits of A-SMGCS obtained during the European Commission project BETA (operational Benefit Evaluation by Testing A-SMGCS) are analysed and compared with those of NASA and EUROCONTROL projects in this paper. An outlook to the future A-SMGCS development is given at the end.