My Raspberry Pi will already stream all of my media for me remotely. With this guy [1], the Cubox, I can have even more power (1080p) video, in a small, nicely contained box. With a uPNP A/V or DLNA client, I would be in paradise (as I already am with my Raspberry Pi).
Will play all of my movies and TV shows on my server, it works as a DLNA receiver so I can play content from my server or phone and use my phone as a remote and it will act as an Airplay client.
Why, oh why, would I pay $300 for a Google Play-only device?