Appreciation: Autumnalis Rosea in Philadelphia - attractive young trees in full bloom

Thanks to Brett Krasnov (a facebook friend of facebook friend and cherry scout Laura Blumenthal), who posted these 'Autumnalis Rosea' photos from an almost-downtown street in Philadelphia, Pennsylvania. These trees are much nicer-looking than ones of this cultivar that we see here. I'm guessing that they're bottom-grafted. And they're covered with flowers, really a nice splash of colour. It makes me understand why they ever got popular.