I was in 21A for a SFO-MSP redeye a few days ago. As far as domestic Y goes it doesn't get much better. The armrest on the right is fixed for the tray table. I don't mind this since it keeps other people out of my space but it slightly restricts seat width.

As far as the TV goes I couldn't get to sleep (partially thanks to the rock hard seat) and decided to watch a movie for the 2nd half of the flight. The TV is far away but not too impossible to see.