Chromecast uses?

I am really curious what people are using their Chromecast's for. I have had mine for a few weeks and think I have only used it once. I like the Play integration but I don't really watch Youtube enough for that to be a big deal. The major down side for me so far is having it lock up a second device while casting video.

So, any uses outside of Play, Netflix, Youtube, and the "not ready for prime time" Chrome Browser casting? If this thing ever integrates Plex and allows me to stream from my local server and use my phone as remote only everything changes and this becomes extremely useful. I am hoping that happens.