Excellent question, Jefe
Joel,
There was an article just yesterday in the Wall Street Journal about how, to quote aviation consultant Michael Boyd, "the age of the regional jet is over." Turboprops are making a come back in the 50-90 seat range. Good news for Bombardier and ATR - the remaining manufacturers of the things.
With oil at over US$100/barrel, the smaller Canadair and Embraer jets have stopped making financial sense. This has resulted in Delta abandoning markets like Toledo and Atlantic City - not because yields were low but, rather, because Delta's regional airlines do not have the fleet to be able to operate profitably at higher fuel costs.
10 years ago, regional jets were seen as the saviors for smaller airports. The turboprops that traditionally served them were slow, uncomfortable and vibrated like a jackhammer. The regional jets, while still damned uncomfortable, were at least fast, and allowed smaller airports to market their "jet service" as competition to bigger airports that might be 2 or 3 hours drive time away.
So, yes, we expect to see an increase in the number of turboprops over the next few years. The new offerings from Bombardier and ATR have fairly large capacities, good speed and low vibration (thanks to new technologies). No, you'll never fly SDQ-JFK on one. But a short range flight calling for a 50-70 passenger bird - such as STI-FLL - would be a possibility in the medium term.