If you've ever done table top roleplay, you know what is just a small skirmish can take up a long time at the gaming table.
But what if you had something like this - there's the option of just rolling to hit, and comparing that to a chart it shows how many shots you use and how much damage the bad guys do, before they are defeated or forced into retreat.
Okay, the important thing is that this is actually an opt in system - the way it's presented is that before combat begins, the GM might want to do it this way, but all the players have to want to do it as well, otherwise it goes to the traditional combat system.
That way if it takes a long time, it's because the players wanted it to take a long time!
Further info ~~~
The model for this version is that all players have to want to do the quick version. If even one player wants to go traditional, you do. This doesn't mean other players slope off to play Xbox - they play out the combat, because if one person votes to do it traditional, then that's what everyone does. The one person who votes that way aught to consider why they would take that option, given the strong effect it has. Or if they just take it for selfish reasons - well, I consider gaming to be like playing in a band...and bands don't hold together very long with people who only think of themselves.