Thats a very good thing. But no bank has reported that they are buying and selling bitcoins yet. Only that the law was approved in Germany and the law will allow banks there to be able to buy and sell Bitcoin. But, there have not been anyone that is accepting it yet, the law was passed January this year, so banks wouldnt rush into it yet.
As time goes on they will start selling it to their customers. I also look forward to when other countries will set similar rules and allow banks to be able to sell Bitcoin to people, it would be really good.