The lawyers are going to have a field day with this. Anything that sounds anyway close to another song is now fair game. To make matters worse, the only thing that was supposed to be decided here was the sheet music (remember, the MG song was copyrighted before the updated copyright laws went into force. Only the sheet music was supposed to be the focus of the trial - which should have meant a very short trial and decision). Yet the decision was not made on the sheet music, but rather the 'sound'. If that decision stands based on earlier copyright law, it does not bode well for songs that sound similar or have a similar feel created after the extension of the copyright laws.
On the other hand, it might be worthwhile getting the bag of popcorn and watch the industry sharks eat each other. For an industry (not music, but industry) that is dying, this isn't gonna make things any better for them.