Google Finance

This morning I saw this news of the launch of Google Finance.

It looks like a stock chart on top of the Google news. I don’t think it is enough to attract reader to this site or service.
Every finance service provider has stock chart, even can make transaction online. Why they need the Google Finance.
I just have a image in my mind about Google’s empire.

They have the top one search engine, I think. It can be used to organized all different kinds of information, like wabpages, emails, newsgroups, forums, blogs, news, chatting records, videos, books. Now it is finance, most profitable side.
I guess Google may or will purchase some finance services provider, to provide stock transaction online without commission, or with very low commission. This will be huge crash on Wall Street.