the cubs are currently turning a former surface parking lot west of wrigley field into one of these "event plazas", along with several other large developments in the immediate vicinity that will include hotels, a cine-plex, bowling alley, new restaurants, blah, blah, blah.....
because wrigley sits right smack dab in the middle of a very densely populated city neighborhood that already
is a nightlife hotspot, it will probably be more successful than some of these other "sports entertainment venues" that are seen more as downtown revitalization silver bullets.
here's an aerial of all the construction currently taking place around wrigley. the new event plaza will be immediately to left of the stadium in the image below.