fair play. this is the problem with the stupid US patent system, obstructs thing that have been done before simply because no one has challenged the patent. Samsung could side step this issue around the voice component by not shiping with the software and offering it as an app. probably wont appliy outside US either (no software patents in EU)
Apple don't want to go after Android directly by suing Google because they hold too many of the cards so they do it indirectly by going after the manufacturers instead.