while the decision is pretty tightly tailored, it seems like it's SCOTUS' way of opening the door for subsequent arguments regarding pure software patents. take google's page rank patent[1]. one could argue that assigning scores to, say, academic papers based on references cited and then doing that repeatedly is an "abstract idea" and google's recitation of "apply[ing] it" using a computer is not enough to enter into patent eligible subject matter. if you read/listen to the oral argument, the counter argument that doing so on a massive scale is impracticable was flatly rejected. indeed, a million monkeys counting the citations of scholarly pubs could probably perform that method on a decent sized corpus. is the method therefore inherently abstract? will be interesting to see if Alice alters the analysis (albeit slightly) for these types of questions and whether we'll see a pure software issue (without the negative financial/business method clouds in the background) sooner rather than later.

[1] http://www.google.com/patents/US6285999