Originally posted by: Xajel
I forget to say, AFAIK chip's manufacturer only designed a USB3-SATA controller, I never saw/heard of some PCIe-USB3 controller yet, they need to make one so card makers can make some PCIe cards...
The chips already exist. Here is one: NEC uPD720200
It is a USB 3.0 HBA that hooks onto a PCIe 2.0 bus.
any way, we still need some USB3 devices, and AFAIK; no company yet announced any device... not even some rumors around as they need some USB3 chips to work with and as whata I said I've only heard about USB3-SATA controller, so external HDD maybe the first wave of USB 3 products coming... duo tot he fact storage already faster than USB2 specially when talking about SSD and 7200RPM hdd's, but eSATA is moving too in this field and it's already available... maybe lake of power in eSATA is what slows it down but powered eSATA is already in the market by some mobo makers...
next we may see some other devices ( multimedia, networking, etc... ) the problem with USB 3.0 enabled devices now is that they will be little bit more expensive to make till more devices comes and production for chips/connectors/cables become more mature... the another problem that I think will slow down the move from USB2.0 to USB3.0 is the fact the most USB2.0 devices already have all the bandwidth they need and more from USB2.0, so moving to USB3.0 will not give them any positive performance ( I dont' know about latency, but if USB3 has less latency than USB2 then storage will be the key factor for spreading USB3 )
The initial USB 3.0 I/O chips are going to be expensive. NEC's HBA chip is supposed to cost about $15, to give you an idea. HDDs would probably be the first things to get upgraded to USB 3.0 as they are terribly bottlenecked by USB 2.0. I'd expect USB network devices to not be far behind. Most other peripherals don't use much bandwidth and would only upgrade when USB 3.0 ICs are not much more expensive than USB 2.0 ones and don't consume more power.