Amazon Prime subscribers have received a bit of a treat, as Amazon just flipped the switch for Prime subscribers to stream movies. There are over 5,000 movies and television shows are available. Early reviews peg the service as promising. But Netflix it is not. The “free” Amazon Prime Instant Video service — with a not so free $79 Amazon Prime subscription — has a collection of movies and television shows that is sort of what you would expect. Lesser quality than the likes of Netflix, but still enough to possibly keep you entertained. The actual video quality is a bit suspect. With Engadget’s…