According to the nytimes, it looks like a “new behemoth double-decker bus today that will cruise city streets in a 30-day trial run”, the first time this has occurred since 1953. Not just cool looking, the new buses have lots of great new features, like the ability to run on ultra low sulfur fuel, and low floors which are great for those using wheelchairs.
New York could lead the way with these buses. Get more details here