I am pretty much a noob on this.
But I checked this out on the canon site yesterday.
Lots of new consumer camcorders don't have FireWire anymore.
Most of them, actually.
At least the "hot" new ones that manufacturer seem to be pushing.
The light and "thin" variety (notice the common theme with Apple products).
So while your old consumer camcorder might only work via FireWire, you can easily get a new one, which doesn't come with FireWire at at. Also, I think many people ("the iMovie munchkins") are using their pocket-size still cams for iMovie, rather than dedicated bulky camcorders. So not many need FireWire.