While all the numbers look impressive.. realise:

USB1.1 to 2 - 1MB/s to 30MB/s

And that was provided that you had a hispeed device/port not all supported.. but that said.. the speed improvement was Impressive (not breath taking)

While USB 2 to 3 - 30MB/s to 300MB/s

10 to 1 improvement.. sounds good.. BUT 30-1 sounds better.. all the GB/s sounds just impresses the consumers
Also these specs are for a single port on a hub, as in the glancing reading I have done can I see where this is ALL ports loaded.. so if your doing a transfer from device to device.. on the same hub.. don't expect the full speed.. expect less than a third

So it is an expected upgrade.. but not earth shattering

what is interesting.. USB Monitors, PC's ie the netbooks will be able to be fully upgraded via a couple of USB3 ports HQ Sound, Video, Blueray burner, etc...

I'll see if USB4 has a hope of impressing... What we really need to is dump these antique 32bit systems.. get 64 fully adopted.. as 128bit is overdue for desktop