It wasn't that long ago that many people were asking if the regionals would fly pressurized cabins.
It wasn't that long ago that many people were asking if the regionals would fly with a flight attendant.
It wasn't that long ago that many people were asking if the regionals would fly turbines.
It wasn't that long ago that many people were asking if the regionals would fly 50+ seats.
Will the regionals ever fly 100+ seats? Yes. There's no way they won't.
FYI - Jazz just got 757s to fly up in Canada.