But we say the same thing when we plug in a USB 3 device
And see that message it's painfully slow.
When Apple first introduced USB many failed to see the benefits and the same thing happened when Apple introduced Firewire. What was the one big difference between Firewire and USB? Other computer suppliers adopted USB and actively supported it where as Firewire was sort of an Orphan there unsupported and with few devices to use.
It's not a matter of it Thunderbolt is better it unquestionably is faster it's weather or not companies will support it other than Apple which will be it's Saviour or herald it's demise. You need to remember that even USB wasn't widely accepted by component makers till well after Apple introduced it and if Firewire had of not been dropped in the next year or 2 it would have taken off just like USB did about 4 years after Apple Introduced it in the PC Market.
Even then it's not so much a matter of if Computer Makers make systems with Thunderbolt Ports it's if there are devices to plug into these ports that will be the Make or Break of Thunderbolt, and for that to happen the PC Market will have to openly embrace Thunderbolt which we'll have to wait and see if they do. Even today how many USB 3 plug in devices are there available. A few Thumb Drives are there but currently no external drives which is the important thing to go with.
Col