A GigE Vision machine vision network can be upgraded to 10GigE speeds and still deploy Camera Link cameras using devices such as this iPORT CL-Ten transmitter, with two Camera Link ports and a 10GigE port.
Source: Pleora Technologies
What you'll find in these types of systems is that if the video needs to be transmitted only a short distance, from maybe 1-2 cameras, directly to a PC and no further, that 10 GigE might not be the right technology, cost-wise.
But most high-value systems aren't like that - either they have a more than half-a-dozen cameras (especially web inspection systems), they need to distribute imagery to multiple endpoints (for example, for distributed processing and analysis), the endpoints need to be far away from the inspection areas (especially in dirty environments like steel or textile inspection), or some combination of the above.
In any of those cases, 10 GigE can bring a cost savings, especially when you subtract out the cost of framegrabbers and/or expensive cabling and repeaters.
It would seem that with all the emerging high-bandwidth applications in medical, military and other segments, 10-Gigabit would be a natural upgrade path to get the higher performance so the machine vision infrastructure can keep up. What is the downside to going with 10-Gigabit Ethernet offerings? Higher price?