I so hope the new 2012 Macs have USB3. Please! After much consideration and deliberation, today I bought a Seagate Goflex Thunderbolt adapter and a separate 500GB Goflex drive that came with its own USB3 adapter. Seeing the two adapters together tells you immediately why Thunderbolt take up so far is so poor and why the devices are so expensive. A picture paints a thousand words, so here's the two adapters: The USB3 adapter is perhaps 1/10th of the volume - a small neat device that clips onto the end of the disk. The Thunderbolt adapter is massive by comparison. The bottom piece is double the thickness and then there's the big slab that goes along the whole length of the disk and is thicker than the disk itself. But pictures only tell part of the story. The performance of the two adapters (USB3 to my PC and Thunderbolt to my Mac) is identical. And probably would still be identical if the drive was 5 times faster. Between 80 to 100 MB/s reads and writes with both interfaces. However, the USB3 adapter runs cold, and silent. The Thunderbolt adapter runs so hot you can hardly hold it, and it has a noisy fan in it, so it makes a right racket!!! An interface adapter with a fan - I have never heard of such a thing. And the final bit of madness - the USB3 adapter is "free" with the £70 disk drive. The Thunderbolt adapter cost me £100 - more than the disk and USB3 adapter put together. Utter madness. I think Thunderbolt has some great promise for connecting remote devices like PCI-Express cards and even monitors (what was wrong with Displayport though? Or Dual-Link DVI for that matter). But as it stands, it is borderline complete rubbish. The peripherals are ridiculously expensive - not that many are available anyway. And with engineering like the example above, it has a long way to go. I fear Apple has "bet the farm" on Thunderbolt and will be reluctant to include USB3 support in the new Macs. Well in a way they would be right. No-one is going to pay £100 extra for a noisy, bulky, power hungry peripheral are they. Not when the USB3 version is none of those things. On the showing so far, I'd give it 1 out of 10.