Update for those who are interested
Signed up for the service mid September and have been happy so far.
The watch tv app is available for Android and Apple. It does support Chromecast but only when you're on a separate WiFi service. The app itself isn't as streamlined as Netflix or Hulu but it gets the job done.
The On Demand library is extensive, with past TV episodes and movies available.
The stream ing isn't very smooth, it spends a lot of time buffering and just randomly stops at times.
I did confirm that using the service from your phone (not from the hotspot) is "free" so it doesn't count against your usage cap.
I recommend using a phone with a cabled video output, as I haven't found a way to cast the screen while the hotspot feature is enabled.
Next test is the unlimited talk, text, data and stream ing in Canada.