You know how I talked about the iCEnhancer mod for GTAIV. Well, forget about that. Yep, the image above is actually a screenshot.
Programmer "gionight" went ahead and modified ENB Series version 0.82 into this gorgeous beauty. Of course, the specs required for this is rather exorbitant. According to "gionight", it runs at a constant 50fps with an i7 processor at 4.0Ghz, 6GB of RAM, and two EVGA GTX 570 SC in SLI. (Throw in some extra letters in there for good measure.) Regardless, you can download the mod at gta4-mods.com.
Then again, these are just screenshots. This is not gameplay footage, which is what counts. And why are we still modding GTA IV? Why not Deus Ex: Human Revolution? Or L.A. Noire? Or something that came out in the last two years?