Roundbased Conflict Resolution

I was reading some 90ies Thunderbolts comics yesterday and issue #2 (the fight with the Wrecking Crew and the sudden final twist, to be exact) gave me the following idea.

Comic books don't have unlimited space for their fight scenes. They need to be resolved in a few pages. So wouldn't the same be handy for fast RPG conflict resolution?

The conflict would have a certain number of rounds that you would decide before hand, depending on the importance of the conflict. Let's say 2 for fighting some minions or 5 for the dramatic final battle.

Each round is resolved either group based - if it is suppossed to be fast, e.g. against minions, or character based, if you want more detail.

So in every round everyone does their action and each round has its outcome. Something along the lines of.

Victory and
Victory
Victory, but
Loss, but
Loss
Loss and

You see where I am going here, especially if you know the new Doctor Who RPG...

The "but" gives an advantage to the losing side? I have to think about that...