Introducing Starry (ex-Aereo)
starry.com
starry.com
To a casual observer with a bit of amateur RF experience, 'millimeter wave' frequencies seem like a poor choice, as bands in the millimeter wave spectrum are going to suffer from lots of signal loss just due to attenuation from air, humidity, and rain. And these bands won't have particularly great range or penetration capabilities.
So it definitely appears to be a 'last mile' type technology. Since everything (on the face of it, anyway) suggests that this is a poor fit for long-range implementations, I find it odd that their marketing materials imply that their tech will help bring broadband to the ~20% of the USA where broadband isn't available.