DAL (Love Field) had a monorail many years ago, but it was taken down after WN took over the terminal.
MCI is supposed to get some sort of APM over the next few years. For now, it uses busses to transfer pax between terminals and from satellite lots. Shuttles x-fer pax from the terminals to off-airport parking and rental cars.
TPA has a monorail built by Bombardier for about as cheap as any APM has ever come.
If IAH is working with Disney, bet on Monorail. After taking a PR beating when Disney talked about doing away with the Monorail, Disney has since taken up the "cause" (if you will) of Monorail, promoting it as transit, which was the reason Walt put it in Disney Land and Disney World/Epcot, anyway.
EWR's Monorail is about the best example of how not to build ANYTHING, let alone monorail, in the world. After changing contractors in mid-construction, the system had many problems at first. So far it seems that things have been fixed. Only time will tell.
Those who fail to learn history are doomed to repeat it in summer school.