The Middle East has more to offer the world then just Oil. The Middle East also export
The Agricultural products include: food and raw materials. The Mining products include: Ores and other minerals, Fuels and Non-ferrous metals. The Manufactures Include: Iron, Steel and Chemicals. The Machinery and Transport equipment Include: Automotive products, Office and telecom equipment, Textiles and Clothing.
The Middle East Imports: The Agricultural products Include: food and raw materials. The Mining products Include: Non-ferrous metals. The Manufactures Include: Chemicals. The Machinery and Transport equipment Include : Automotive products, Office and telecom equipment, Textiles, and Clothing.
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Saudi Arabia Tourism industry is also pretty big.
The Middle East can survive or find a way to survive if oil becomes unpopular since many Middle Easterners also has other ways of making money.