From The Man Room:
"Gambling. Racing. Brawls. Loose women. These are all things a powerful businessman hopes to squeeze out of Las Vegas in Midway's just-announced new game in development, This is Vegas.
In the game, players will assume the role of a man who must fight, gamble (illegally even), drive and party his way into returning Vegas to the adult playground it's meant to be. An open world sandbox and adult-themed content will definitely give a Grand Theft Auto IV feel to the game, while the Vegas-esque scenery and missions will provide something entirely new."