Ok, crappy firefox reloaded the page before I could post the comment so heres the short version of my post...
Its looking pretty good so far but you should add more details and assets to bring some life into your scenery. First of all I would add some cars (5 different ones should be enought) because thats what youd expect to see on a busy SF street. It might mean more work but itll be worth it.
Id also add some smaller details like grass or trash laying around, you could place them near those lamp posts or newspaper boxes, that would be an easy way to add more details and make the scene look more organic, less empty.
And whats most important, add more buildings in the background and think about a way how you could close the gap without using distance fog or things like that. Im working on a pretty similar project (bit more complex tho lol) and tried to find out how other game devs tried to achieve an acceptable result. Racing games like Gran Turismo 5 or Project Gotham Racing 4 feature some very nice urban environments, some or most of them copied 1to1 from the real city. And what they did was a pretty simple solution. They use alpha planes and photos of the street to close the gap and the result actually looked pretty nice. Especially Gran Turismo 5's photomode environments used these tricks pretty much everywhere and from a certain distance (maybe with some DoF) it look pretty nice. So maybe you should try to get a good screenshot out of google streetview, edit those images and apply them with an alpha channel to a simple plane and see if it works the way you like it. Thats atleast how Im gonna plan to fill some gaps in my scene in the distances.
Maybe you can find another, less blurry sky texture as well.
Otherwise than that really nice job so far. How long did it take, and any chance we could see some wireframes/texture sheets? Polycount would be interesting as well.
