Oh! Sue you, sir!
I’m assuming you’ve read this news. If not, go read it. While this is undoubtedly good news for those practising patent law in the US, for the industry as a whole, the implications and ramifications could be massive. Other giants in the software industry (think IBM and Sun) have embraced open source and integrated it into their business models. Microsoft have adopted, well, let’s say a different approach.
Here’s the most concise reaction I’ve found.
Other opinions are available. The number of patents that are alleged to be infringed may go down as well as up. The software you use may be at risk if you do not keep up license payments because of such an alleged infringement.