The DiRT franchise gets better with each iteration. But with DiRT Showdown, Codemasters is taking the series in a way more arcade-like direction. Carnage is the name of the game now. While we miss the rally races, what's included here, is yet another fine game from one of the best developers around.
The damage model doesn't look that impressive in the DiRT Showdown Massive Damage Trailer. Intentionally trying to damage one another's cars WOULD make for a great arcade game, but the damage model is lacking.
My son bought the game today, and already he's bored with it. The damage models (just as I suspected from the video posted here on OS) aren't very good. Points rewarded for intentional smashes (into other cars) are weight improperly depending on the locations of the hits, in my opinion. The camera options are limited, the available cars available upon purchase (even the two cars unlocked with the VIP pass) are VERY limited. This is just a rehash of the other DiRT games, with minimal effort by the developers put into the demolition derby feature.
Now, if the makers of this series were to ever make a big rig driving game (not a racing one as in "tracks", but with real roads and looooonnnnng road with REAL loads), then I bet it would generate a lot of sales as this company does make games that look 'pretty'.