While it's been available on iOS for some time, United updated its Android app today in order to add support for a rather cool feature: on-device entertainment. Instead of having to deal with that atrocious LCD on the headrest, now you can watch your in-flight movies and TV on your own phone or tablet.
This is likely both a blessing and a curse. Who knows what the stream quality is like (anyone with an iPad who's used it want to chime in?), not to mention the reliability.