Google Image Swirl, keywords based image clustering

Google have launch a new service. A web clustering exploration. The techno is based on keyword. All the image that share a similar keyword are linked. The interface is nice and powered by flash. But the keywords approach show rapidly is limit, the image do not share at all visual content (sometimes).

For exemple type Paris (you will find Paris hilton and Paris city photos....)

On the following experiment you see that I have typed 'Paris'. I have navigate through Paris Hilton clusters and finally I have found a architectural content... (From Paris city, Sainte Chapelle ).

So the approach is nice, but based on keywords seems to be very limited. But is allow to have a nice filtering of information.