Custom internal resolution as in PCSX2

[AnyOldName3]

Actually, I've had a thought: Surely even if the eyes are more sensitive to horizontal quality changes upping the resolution in game won't have any affect other than to slow things down, as even if the game has an increased resolution before this is outputted to the monitor the graphics card will just take an average of the two pixels existing in each pixel, reducing the quality to exactly as it would be if the software wasn't making a larger image.