as an artist myself..can't believe i just typed that. I mean as a person who knows how to swing a pen evry now and then to eventually achieve solutions for graphical task given by the universe - much better - or not - I really like the clouds on the lefthand side of the image.
It is very retro .. the blue neon lit building reminds me of the tower in back to the future 2.
It is a nice piece of concept art. could use some more buildings, yes, as you mentioned.
The concept of the scene - is this like a projection of a cityscape, something virtual, matrix move like? or is this a scene of a woman literally standing on a platform close to a real city, just arriving with her "bike"? the red arch looks like it could all be just like a portal. keeps me guessing. interesting