I'm impressed with the scope and maturity of the concept they're presenting here. Small attempts at improving usability of the world for the visually impaired have always been kinda cool -- things like chirping walk-signal actuators at crosswalks -- but have always been disparate and half-baked. It'd be remarkable if Microsoft's mass and momentum behind a system like this could be implemented on a large scale in a city to demonstrate how beneficial a fully baked system can be.

And, to fuel the fire, the page design was top-notch, except for the random 2-column blocks which seem an interesting choice given the nature of variable screen sizes.