Apple Users

Here's the difference:

1. Roku offers more channels, although a good half of them are fundie channels or deservedly obscure movies that are in the public domain. I use it for Netflix, Hulu Plus, MHz Worldview (European dramas broadcast every night), and Acorn TV (TV programs from English-speaking countries other than the U.S., including many that are not found anywhere else), and occasionally for catching up on missed PBS programs. It plays Amazon Prime, too, but I truly have not found anything on Amazon Prime that isn't available on one of my other options.

2. I use Apple TV mainly for watching my iTunes purchases on the big screen. Otherwise, I prefer the Roku, especially since the model I have allows an Ethernet connection, which I find to be more stable than a wi-fi connection.