Shard City - First work

Hi, Guys…
Im blender user for many years… I did a lot of tutorials and i liked it… Couple months ago i realized sad truth, where is my ideas ? my work and my drilling into blender -render settings…So i looked up for ideas in architecture created in games… I found this inspiring image from Mirros Edge game - Shard City -

Here is my result. I know, some thing could be better, GTX 770 2Gb is far away from “good” performance.
Anyway i would like to know you opinion about my render result.

P.S. I took bamboo plant from Andrew Price package tutorial.