Wait for DX10 video cards... just look at this...
Microsoft Flight Simulator X in its current state (DirectX 9):
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Microsoft Flight Simulator X in DirectX10 (Artist's rendering):
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According to a senior FSX developer, that second picture is a "realistic" depiction of what kind of visual effects you can expect to see in DX10.. that's absolutely stunning.
Microsoft Flight Simulator X in its current state (DirectX 9):

Microsoft Flight Simulator X in DirectX10 (Artist's rendering):
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According to a senior FSX developer, that second picture is a "realistic" depiction of what kind of visual effects you can expect to see in DX10.. that's absolutely stunning.