Who will have the Power ?

America may stand as one of the brightest beacon of freedom, and opportunity for everyone but what worries me is its diplomatic policies and its zeal to maintain. The treat of dropping the most powerful bomb tarnished America in return of being the most powerful country in the world post Second World war.
Its indulging and influencing capabilities led to the split of one of the greatest communist, leaving fragments of USSR to fight amongst each other for basics of life. The world has seen the dominance of America for over nine decades, and continues to see its hunger through sinful wars on Iraq and Afghanistan.
When America concluded growth and power in this world, it started reaching out to the skies, planets and stellar objects through the lights of NASA. America through years enriched its predominance in Middle east and its hunger for oil made it possible for an American to purchase oil with the cheapest bargain when compared to the world. This resulted in naming the world as a "dollar denomination" world. With the lights of letting England pay back for the help granted to them in Second world war, America aligned a famous body known as NATO which walks all wars and stands next to America as one nation.
America may have been and continues to be the most powerful country in the world, but one questions crosses me with every ticking minute.
Is America walking the same lane which once Roman’s had?
Is America another example of the greatest empire falling like the Roman Empire?
With the current economy, world sitting and looking at East conveys that the time of power abdication has come. Has Obama’s reform now in China and next year on his visit to India, confirms on it. I welcome your thoughts to describe Power an bids of anexing - “India or china”.