Currently, if you are on a Call Queue call you can receive a personal (direct) call at the same time and can switch to that call, reject it, etc. We have some smaller call queues where it would be beneficial for one person to be able to pick up multiple calls at a time. E.g. They're on a call queue call, see that another is ringing, and they put the original call on hold and tell the second caller that they'll be with them shortly (etc).
Clearly, this would not be suitable in every instance but having the option would be welcome.