landscape of official storm of war trailer

[David198502]

http://www.youtube.com/watch?v=2GtsNqaE1yU

yesterday i saw this trailer for the first time, and i have to confess, i was really impressed by the landscape storm of war had back then.
i was told that the trailer was made in 2007 and used the old il2 engine.
what i really dont understand, how is it possible that the landscape in this trailer is sooo much superiour to the one we have now.

i dont want to citizise the devs with this thread.and i dont want to start another compare thread.thats not my intention.
what i would like to know is, how long would it take for the devs, to change the current landscape, so that it would resemble the one of the trailer.
in my opinion the former landscape looks way more natural and convincing, at least for me.
especially the colours and the placement of trees and hedgegrows are in my focus.

is it possible, with this amount of staff, to make such huge changes to the landscape?is it plausible that we will see something like that one day?or is it an unrealistic expectation?
i dont have no glue about programing so i thought i would ask.

ps: i know there are far more important things right now.