I got RO last night just because I wanted to see the kind of work Tripwire has done before.
And honestly, I'm *blown away* by the sheer complexity and number of options available to the player. Realistic? About the only thing RO lacks is picking individual pieces of shrapnel from your body!
The only downsides I saw (in 2 hours of play) were the environments. Some maps were really cool, and some were a little flat, visually barren and there are huge stretches of open ground. While a lot of those were player generated maps, some of the TW maps were a little....well, flat. The result in game play was a lot of camping and waiting for people to appear so you could shoot them from 1000 yards away.
All in all though I was really impressed. TW did what so many companies refuse to do: Take an idea to it's fullest realization. If RO was made to be that complex and layered, I can't wait to see what they do with KF.
PS-I would love to see what you guys could accomplish with RO if you had a AAA budget.