Would be short lived. Oil demand would plummet and you’d probably see $40 oil again (or less). US Economy would go into free fall at $6-$7/gallon.
For sure you’re right. The mythical $200 threshold would be crossed if only temporarily, but the nerves of all industrialized nations would be frayed, and militaries would be on the move to protect their interests. It would be a wild ride, and the Iranians wouldn’t fair well.