VUDU just started "Free movies with adds" and if you buy a BD or DVD with Ultraviolet or Instawatch, you can put it in a VUDU library.
VUDU also has 4K movies, in case you have a 4K TV and do not want to buy an expensive 4K player. But a 4K ROKU, or 4K ROKU TV is needed for that.
I have indoor antennae since most stations are only 30 miles tops