I find it interesting as you assume the status quo will constant.
International power varies with time and development.
Technology for example.
The US currently holds a lead in technological development.
That isn't 100% certain continue, it is the most likely occurence but scientific development doesn't always flow to the most developed.
Also the high level of technical sophistication of US military infrastructure makes the US uniquely vunerable in the sense of penetration of secure communication networks.
For example a collapse/disruption of battlefield communications would be far more disasterous to US forces than to there less technoligically advanced opponents.
Now several of you (especially Americans) will laugh at this, but put yourself in Red Teams perspective. You make enemy strenghts weaknesses.
Hackers have proven even the most secure systems can be, at least temporaily, broken into. Which in battlefied circumstances is fatal, misinformation causes mistakes.

Yes US conventional forces are by far the most advanced in the world but look at how difficult it has been to maintain control in Afghanistan and Iraq.
Eventually US taxpayers, claiming government wastage, will reduce their taxes that will weaken US forces in the field.US citizens are patriotic enough to cheer on their troops, just not quite enough to pay their bills.