This could very well be the last time that David, Nick, and Roger share the stage. It's a real shame to retire such an amazing live performance. Gilmour let everyone know that this was only a one time thing, and a tour is out of question. Crushes my soul yes, but what can you do.
Well, here are some fan videos of the performance of Comfortably Numb and a special rendition of Outside the Wall with Nick Mason and the rest of Water's band. You could tell that Waters couldn't wait to get to the chorus, must have been so much built up excitement. Waters stumbles on the second verse, but doesn't take off the value of the performance.
Maybe he might want to redo it...
RIP Richard Wright & Syd Barrett