Version 3.0 of the iCEnhancer graphics mod is out for download. This mod as you can see from the video makes GTA IV look absolutely stunning. The download link is also in the video description.
This kind of mod truly showcases the power modders have, and it will be interesting to see what they come up with with the upcoming GTA V release this fall. The website as of publishing was down, probably due to the swarm of people trying to download it. Be sure to grab yourself a copy if you can!