Add a 10 to 20 second delay after the last commander blows up. It will give us enough time to watch the explosions and take a screen of the end game. (At least until they add who won or lost to the game summery.)
I believe this is serverside, but I may be wrong. Anyways, this stuff is a Beta sort of change, Uber still has to get Mac and Linux builds working first.
I believe the new meta in RTS post game screens is just displaying something like: "Game over, press escape to go to the end game data", so you would be able to scroll across the entire map. I have seen a lot of games do that, starting with AoE2 I think. I'm sure Uber will create something to this extent as well, like Mushroom pointed out.
At game end there should be the usual "view battlefield" options, but with the added features of the chrono-cam and being able to rewind and see exactly how whoever won did it.
This may have been what you meant, but build 50000 includes the "Review" button at the end of a game that lets you do exactly this.