Altough the car looks like a tuned Volkswagen Polo, the car you see in the photo is actually the future Audi A1. The future Mini rival will share the same platform,which will be cheaper to build and more flexible, with the 2010 Audi A3.
According to CarOnline there are chances to see on the streets derivates of the Audi A1 like the Q1 and the S1. Also the quattro system will be available on the future Mini rival. More things will be revealed next month when Audi will unveil the A1 prototype at the Tokyo Motor Show.
Source: http://4wheelsblog.com/spy-photos/spy-photos-audi-a1