Special tooth shape guarantees a tighter contact with chain and softer pedaling. Chamfered edges and wide mud gap keeps the ring from getting muddy. Increased tooth height improves chain retention while the bike is shivering and jolting. Overall bicycle weight reduction in the range of 150-400 grams (with no front derailleur and chainguide).
You can reach an optimal drivetrain chainline value with variable chainline technology (VCLT). You save bike weight by not using crankset spider and you can opt for the chainring with appropriate specs for your drivetrain.