I did this for central Oklahoma City about a year ago. Green are vacant lots/brownfields and red are surface parking lots. We have a very dense CBD with no surface parking (leftish bottom center) surrounded by some serious urban renewal casualties. As with many other cities in the thread, a lot of the parking and lots are already being converted to mostly apartments and hotels, particularly the area just northeast of the CBD (Deep Deuce neighborhood) which now is almost empty of surface parking.
I think it is encouraging the rate that parking lots are being seen as opportunity sites, and in the long run all these empty lots could be to the advantage of sunbelt cities trying to recover from sprawl.