lightning fast?
Oh dear. Yes, USB3 should break the 30Mb/s (typical) to 40Mb/s (best in class) transfer bottleneck and expose most of the 100Mb/s throughput of drives...
...for a whopping 3x speed improvement. Does that really justify "lightning fast in comparison to today's tortoise-like slowness"?
Meanwhile today's Firewire800 will inevitably deliver higher performance and lower CPU use. It just doesn't deliver 'cheap'.