Hey, Poko, thanks for a nice comment.
First of all, that cable not connected to anything, is going to be connected to my designed product. :)
The reason i put some lights on is, in some areas, light wasn't enough. But to make it look more legit, i can think to lower sky light, or i can just turn off the lights, i'll think about it.
Yes, there are some artifacts, i'm working on them. I think i've solved them already, it will be OK with the next update. (putting light samples to 5 seems like made it OK)
It's not 90 degrees because of the camera. It's not a final shot, i just wanted to show every part of the room with just one render, that's all.
Putting an organic model is a good idea, but i'm not really experienced about organic modelling. I don't think i can make it as realistic as i want.