Yeah, like every one of them is going to be flying in the same place at the same time.

Fractionals were the latest big thing about ten years ago and they soaked into the landscape without stressing the system much. If anything, It will be a benefit to ATC to work a VLJ into a major airport, as opposed to the twin Cessna the VLJ is trying to replace.

The key, I believe, is going to be what the manufacturers are willing to do to ensure that these pilots are properly trained. If there is a dramaticly poor safety record for these things over the first couple of years, then the die will be cast for their future. It's in the manufacturers best interest to see that the safety record remains stellar.