Once consolidation allows a couple of nationwide carriers to set profitable fares, then maybe we'll see them really compete on service, meaning good, well compensated employees and a return of meaningful amenities....or RyanAir, unfortunately.
Consolidation will NOT reduce capacity nor "allow a couple of nationwide carriers to set profitable fares." Consolidation at this point will only reduce the number of targets that the LCCs have to shoot at. It's part of the natural evolution of the travel industry.
In every mode of transportation in history, the first to use it (with the exception of walking

) have been the well-to-do--from camel caravans to stagecoaches to trains to busses to airlines. Prices were high in relation to the average wage in society, there were lots of "amenities" and pampering of the well-to-do customer.
As time went along and technology made the particular mode of transportation more available to the "common man" people stepped in to offer the service with less amenities, but the same mode of travel/elapsed time/destinations as before. It's what is happening again.
Within a few years (I think, less than 10), air travel in general will be nothing but transportation from point A to Point B. Passengers will, as a matter of course, pack a sack lunch to eat on the trip. SWA, JB, and others of that category will rule the sky.
The problem for those of us in the "legacy" category is that we have not managed expectations the way that SW and JB have done. The SWA passenger EXPECTS nothing but transportation from Point A to Point B. Herb has been very careful over the years to make sure that the message his advertising puts out promises you nothing other than transportation and a low fare--not the lowest fare, a low fare.
We seem to continue offering the customer "an experience." The problem then arises that the customer is all for having an experience, but they want it at the same or lower fare than charged by SW! Now, we may still be around 10 years from now, but we will be flying in the no-frills, transportation from Point A to Point B mode, but with very disgruntled passengers who will still be expecting an "experience" because they are on American Airlines.
Case in point...last night I was working a flight from Love Field in Dallas to St. Louis. It's an hour and 15 minute flight departing at 2000. Halfway through the flight a coach passenger asks me, "Aren't you going to serve any food on this flight?" (In a somewhat incredulous, leaning toward nasty, tone). When I said no, he said "Well, I could have just flown SW and saved some money." The fact that our fares on that route are equal to or lower than SWA is of no consequence to those passengers because they BELIEVE that SWA is cheaper.