[ajross]

> I prefer using the STB directly with a remote

The idea is that your phone (or tablet or laptop or whatever) becomes your remote. If you want to watch something on Netflix you pull the phone out of your pocket, launch your Netflix app, and then hit the Chromecast button to send the output to the TV. It's not a separate UI, just a separate destination for the video content you've already selected. For me, the simple fact of never having to hunt for a remote is enough to justify the $35.

On a technical level: what the chromecast is doing is simply streaming content from local devices on the Wifi LAN. It has no UI of its own and won't fetch content by itself. The codec suite is limited when compared to Android: it supports H.264 baseline, VP8, MP3 and AAC. And I believe the container must be either MP4 or WebM.