I think that this is the wave of the future. I just spoke to a PMF candidate yesterday, who is in Colorado and appreciated the opportunity for "virtual interviews" with hiring officials. It saved him the time and travel expense, while allowing him to continue his studies. He is also a 100% disabled veteran and is facing challenging mobility issues.
He told me that a couple agencies, includinng the Department of State, chose not to participate in this year's virtual job fair. Instead, they will be contacting PMF finalists directly.
I hope that this experiment works and that we eventually use this model for all future job fairs. We can't afford to be shipping hiring managers and potential applicants to job fairs in conference centers any more. We should use technology to assess, interview, and select the best qualified applicants.