Metra extensions/ RTA expansion

OK, I just thought it would be interesting to see what other forumers thought of Metra extensions and/or possible RTA expansion into surrounding counties to service other metro areas with Metra (and also Pace, but for this thread lets just stick with the trains.) Also, lets hear some opinions how extensions and expansion would effect Chicago area tourism, business, retail, housing, traffic, thoughts on reverse commuting, and even urban sprawl.>