Some airlnes already charge for exit row seating, but waive charges for their elites; if this comes to pass at US, there's still hope that exit row charges would also be waived for Preferreds ... so somehow the exit row seats that may show as "Choice" in such an event would magically convert to Preferred seats upon login by a US Preferred (something like Coupon Connection opening up when a qualified FTer logs in)

Let's wait and see before getting too excited ...