I have no dependable data other than anecdotes and personal observation, but my guess is the following:
1. NJA will survive and be viable. A service has been created and substantial demand is there. How far it grows long term I do not know. But for the US domestic market, it is here to stay. There will always be a cadre of people who want to fly privately, don't want charter brokers or cut rate charter, and don't want/need their own a/c. Especially with prices where they are, I have thought about buying an a/c with a few others. However, NJA provides a safe, dependable and headache-free service. No hiring, firing, bills, maintenance. Our tough decisions are what to order for catering -- and I am being serious not my usual sarcastic self. I do agree with many of the posters that in time NJA will reduced the number of options in the fleet.
2. Other fractionals will be tough. In my opinion Flex and CS exist as an introductionto their respective manufacturer's products. It is akin to the heavily subsidized car leases. Eventuallay it catches up to the parent company and you need to be able to justify the existence. I think CS (now as Citation Air) is branching out. I think the market is ripe for very dependable, price sensitive, heach-ache free,safe charter. I have not studied the new CS business model but maybe they are trying to capture some of that. I think that Avanair has a good service for some people. There are many who need/want private aviation for short hops and thir product does seem to be in a sweet spot. Great for personal use: Bahamas, Florida, Nantucketm, Martha's Vineyard, Eastern Long Island, Vermont; and for short but strange business trips --Trenton, NJ to Buffalo, NY, Macon GA to Birmingham, etc. Flight Options looks like it may have a good entry product with the Phenom based upon the costs I have seen.
3. Cards -- they will always exist in some form. They are a great intro to private aviation. I think card sales will decrease. In the good economy many people bought/received cards as bonus, gifts, etc., or just to treat themselves. I think a good bit of this market is gone for a long time. As I have said before, I think that cards are great for short term users or people who do not want, can not afford, or donot need a long term commitment.
The fractional business is by definition is very inefficient. Other than peak days, I get to fly when I want, regardless. There are many times I have flown into XXX airport in an Excel only to have another Excel take off within 1 hour of my flight for its passengers. Very ineffcient. If the model gets redefined to provide some incentive to owners to allow the operator a little flexibility in scheduling, the model can get much more efficient. There have been other times when I have done an out and back in 14-15 hours. That was best for my schedule. However, NJ had to swap crews and kept the same a/c for me. If I had some incentive maybe I wold make my meetings a little shorter. There are many times I would be flexible by an hour to 90 minutes from some savings, and sometimes when I can not.
I actually only see marginal growth coming becuase of the airlines. Over the past decades the airlines have done an awesome and incredible marketing job for private aviation. Other than someone who has not yet had the wealth to travel privately, all the juice has been squeezed from the airline orange. Ober the past 10 years if someone has had the $$ and has had the inclination to travel privately, they have made the switch. However, there will be some marginal sales from people who have had the $$ but not the inclination, but now as they are getting a little older and have some health issues, do not want to deal with the airlines. I would save these people are 75+ and typcially fly from to and from Florida several times per year, and have decided to leave the kids and grandchildren with a little bit less inheritance.
I end withsomething I have posted for a while. Flying privately is a nasty addiction and probably one of the toughest to kick. Once people have the taste, they will do all they can to fly privately and maybe even sell the 3rd home to be able to fly to the 2nd privately.
Fly safe.