Is this a sneak peak at the next gen Grand Theft Auto, or is it another lame attempt by someone to fool us? I don’t know that answer so I will let you decide, but if it is real then it looks like the main character is female and it looks to take place in Miami (circa 1955) or modern day Cuba.
My honest opinion is that it looks fake, but I do like the 3D navigation map.
UPDATE: According to Eurogamer, the GTA4 screenshot is a hoax, surprise! surprise! surprise!