Well... there was War Z and there are other similar games in production. Anyway if this tech were to become a game it would need to be greatly optimized.
The War Z is a shit game on an engine with reputation for purely shit from developers known for their shit and lies. And let's not forget that it was a reactionary ripoff cash-in to DayZ's success from the get go.
DayZ is a mod that actually exists and is fun to play, based on Arma which is also fun to play, if not laden with weird and often hilarious bugs and based on a laughable (for security's purposes) trusted-client model, which is being completely rewritten for the standalone. But I have had many hundred hours of DayZ fun since the mod was released, and I don't doubt the standalone will be great, they just need to keep being honest with the community and taking their time to get it right.
Anyways, yeah, I just meant that the landscape style in this tech demo is similar to that used in Chenarus in DayZ, but probably a little closer to Skyrim's art style in some regards.