While the figure at the top might change, the military-dominated power structures beneath may prove much harder to shift from power.
Beijing is becoming much more assertive right up to territory held by other nations, both with military force and "civilian" vessels.
If the race for ever more powerful weapons now extends beyond the sky, there is no telling where it might end.
The loss of the U.S.'s long-running military technical edge is clearly a major concern within the Pentagon.
The outside world should not cave in to Beijing's pressure to turn a blind eye.
Artificial intelligence is creating new avenues for war in what could be the century's defining arms race.
China may be reaching for the moon, but Xi's latest speach is a reminder that its top territorial ambition lies much closer to home.
Clash was another demonstration of Moscow's growing appetite to use unorthodox techniques to redraw the geopolitical map
Intimidation is increasingly one of China's first tools of choice, but the heavy-handed approach is yielding mixed results.
For the first time since World War II, the U.S. must consider the prospect of war against technological equals