Google started to use a game similar to The ESP Game to improve its image search engine. The addictive tool lets people contribute with valuable information and tag the millions of images from Google's index.
So how will Google Image Search look if Google uses the keywords obtained from the game? Here's ESP Image Search, a search engine based on the data from The ESP Game. Unfortunately, this search engine has a small index (around 30,000 images).
So, let's compare.
Image search for "China" on Google:
Image search for "China" on ESP:
The search engines have different sets of pictures and ESP shows the results randomly. However, it has better results.