It wouldn't be direct. They'd have to do loops and transfers to make it even remotely affordable.
As I said previously in this thread, one of the most common complaints at WDW is that guests have to transfer to get from the MK resort loop to Epcot. They just don't like it. I can't blame them, it is a huge time waster. Imagine having to do it for every park.
Now imagine you are a family with 2 or 3 young children, exhausted at the end of the day. All they want to do is get back from MGM to Port Orleans Riverside and sleep. However, they have to get on the monorail, then go to the "new Transportation and Ticket Center #2" (which services MGM and AK). Then they have to transfer to the "Moderate Resort Loop" which first makes stops at Caribbean Beach, Coronado Springs, Port Orleans French Quarter, and finally Port Orleans Riverside.
Finally they are back at their resort. Unfortunately, they are at the front of the resort, and their room is in the back, near where "South Depot" used to be for the busses. So they have to walk all the way to the back of the resort, with three tired kids.
Total travel time? Two hours plus. All because monorails are so great. :hammer: :brick: