Internal resolution over window size?

[vgrageaholic]

Is there any reason to have the internal resolution higher than the window size? Surely it wouldn't make a difference?

[abdo123]

well raising the res higher than you monitor give an AA effect try it if you want

however you can also use MSAA and FXAA if you want some real AA

[Squall Leonhart]

and yet, it does.