FireWire biggest supporter was Apple and now it looks like Apple getting ready to dump them within the next 4-5 years. USB is more "universal". Everything is USB. Firewire looses the speed advantage with USB 3.0 as it still faster than FW 3200. Personally, I think that eSATA/USB (You know those dual eSATA/USB ports that some Dells and Toshibas have) are the future and hopefully we will see them on future Macs.
I know that wikipedia isn't always the most reliable, but it does state 3.2Gb as the upper limit for USB3.0, so how are you saying that it's faster than Firewire 3200?