At the rate that we are getting 737 replacements, I don't see it being a big issue with us losing 37 757's. The 757's aren't going away overnight.
But I'm not worried about it. I didn't want to be a 737 Capt even though I could hold it. I know that you are excited about the possibility of displacements as are most long term L-UAL First Officers. Patience, you'll get that left seat soon with the amount of retirements.