What about Personal Rapid Transit (PRT)? PRT is an automated transportation system where passengers ride in 2 to 4 person vehicles on elevated guideways non-stop from where they started all the way to their destination.

If we're honestly taking a "critical look" at BRT and Light Rail, then minus the politics of modern transit options, PRT will be an excellent amenity to the future of public transportation. Just take a look for yourself: cPRT.org.