As someone who has spent the past decade getting to know the Arabic-speaking world, I should act in my interests and claim the Arabic-speaking world to be the single most important region from the perspective of U.S. interests. But I can't do that honestly. As I read documents like the National Intelligence Council's 2025 survey, I grow to suspect that specialists of East and South Asia will be far more important to the United States than we would-be Arabists going forward. - Andrew Exum
I think this is right but I don't think we're going to see a steady, linear march away from the Middle East toward Asia. Indeed, Washington's interest in the Middle East is likely to increase over the next decade as the consequences of Iran's nuclear program become apparent and, more importantly, as the world jockeys for increasingly scare energy resources.
We will ultimately get around to giving Asia the attention it deserves in the same way the U.S. tends to handle most strategic shifts - in an ad hoc and crisis-driven manner.