How do you imagine private IP will work? You walk into a city and all of the sudden either every other Pulmonologist will defer to your expertise and send you every case they have? As you're not going to go to a city that doesn't have other pulmonologists as the volume is unlikely to be there to justify much Stand alone IP. Not only othe pulm but you'd have to walk into and be able to smooze the thoracic guys we your be cutting into their model.
I'm in practice in a fairly large city and I'm pretty busy on the pulm side of things, and I can count on 1 hand how many procedures Id need to send out, stents aren't that common, laser/cryo procedures aren't that common, I could have done a few brachy caths but I don't need an extra year of training to do that. Many recent grads are trained on nav bronch tech so doing fudicials isn't that hard. Nav bronch's are cool but SuperD is trying to push their equipments ability beyond what is reasonable (really, you want me to go after 8mm pleural based nodules?) valves and glue aren't ready for prime time.
I may be pessimistic, but despite what the IP academics want us to believe the specialty is not ready for prime time nor do I see it working outside of large metropolitan academic centers. They can keep pushing the boundaries of what is feasible in those centers and slowly spread the training to newer generation.
