Depends on your take of it. I don't have the Coruscant books so can't reply to that specifically, but if it were me, I'd probably lean more to a Bladerunner-isque feel if it was earth more consistently developed from today.
PL7 (I think, from remembering Alternity - I haven't yet put my hands on a D20 future book) Gritty, dirty and dim, huge conglomerations with buildings commonly hundreds of stories tall, the floating police cars and billboards. IIRC, a setting somewhat like highlander 2, except for no orange atmospher shieldy thing.
Then again, I guess that pretty much matches up with Coruscant from the films, although I would suppose you'd have to push the PL level. Just for some reason, even though the personal seediness is there in that scene where Anakin and Obiwan go into the casino/bar the environment is never as dirty/cluttered as I would expect. Where DO they hide all those cleaner-bots, I wonder?